Negative SEO: How to Spot and Stop a Spam Link Attack

Negative SEO is real but also wildly overdiagnosed. It’s nothing short of trying to solve a very serious crime while the clock is ticking. 

A sudden wave of suspicious backlinks can look alarming, especially when your organic traffic is declining. But a spam-link spike does not automatically mean your website is under attack, and it certainly doesn’t mean you should start disavowing domains.

Google has systems designed to identify and neutralize unnatural links. The challenge for SEOs is separating routine backlink spam from genuine warning signs.

Alexa, play “Under Pressure” by Queen. 

So we’re helping you learn how to spot and stop one of the most used negative SEO tactics: a spam link attack. Also, if you noticed a drop in rankings between September 24 and October 8, it could be because of Google’s latest spam update, so you have an alibi but should still be on your suspect list. More on that later. 

So, how do you know whether you’re looking at a spam-link attack, an algorithmic change, or a different SEO problem?

Let’s open the case file. The Crime: Negative SEO

What is Negative SEO? (The Crime)

Negative SEO is a deliberate attack on a website’s traffic, credibility, rankings, and overall search performance. 

Malicious actors often carry it out through manipulative or abusive tactics like a spam link attack (the weapon that committed the crime), where someone points numerous spam links at your domain so Google punishes you. 

These techniques can also include attempts to associate a site with hacked content, malicious redirects, or other deceptive signals. However, suspicious activity alone doesn’t establish that an attack occurred or that it affected rankings.

The plot twist: Google’s John Mueller has already addressed this, saying toxic links are largely an invention of SEO tools, and SpamBrain, Google’s AI spam-prevention system, has been neutralizing unnatural links since the December 2022 link spam update. That means many suspicious backlinks may simply be ignored and may not cause a penalty.

What Is a Spam Link Attack? (The Weapon)

A spam link attack is a form of negative SEO in which someone sends large volumes of low-quality or manipulative backlinks to your site to trigger a penalty or drag down your rankings. Google’s SpamBrain system now ignores most of these links automatically, so real damage is uncommon unless the attack is paired with hacking or a site weakness. Imagine someone sending you countless postcards. Is it annoying? Yeah. You can ignore it. But if someone broke in and entered your home, that’s a real threat and a sign you need to act. 

Is a Spam Attack Really Going to Harm Your Website? (Checking for Fatal Injuries on the Victim) 

Google’s systems are built to ignore most junk links, so even a few thousand spammy domains won’t cause much of a ripple on established domains. However, smaller, newer domains with thin link profiles are more vulnerable and susceptible to this crime. 

Recently, as the search landscape has changed, there have also been attempts to negatively impact how some brands appear in AI engines like ChatGPT, Perplexity, and Google AI Overviews. In May 2026, Google clarified that gaming AI Overviews or AI Mode citations falls under the same spam policies as link schemes and cloaking. However, these policies should not be treated as universal rules for ChatGPT, Perplexity, Claude, or other AI platforms.

How to Identify a Spam Link Attack 

“It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.”

— Sherlock Holmes in A Scandal in Bohemia 

A good detective starts by gathering data from the crime scene before making any assumptions and choosing a suspect. In this case, you need to gather four crucial pieces of evidence and build a timeline to solve the crime (negative SEO) and rule out the weapon (spam link attacks). 

Clue 1: An Unusual Spike in Referring Domains

A good detective first establishes a timeline so they can ask the right questions. 

Compare the referring domains in your SEO tool of choice (Ahrefs, Semrush, or Search Console) with your weekly pace. In the last week, have any new domains suddenly popped up, and how did they arrive? Bulk placements on the same hosting range, the same page template, or the same odd TLDs point to automation. 

Clue 2: Irrelevant or Repetitive Anchor Text

Next, perform an autopsy of your profile and examine the crime scene for anything that looks amiss. 

Review the anchor text associated with newly discovered backlinks. Large clusters of unrelated commercial, pharmaceutical, gambling, or adult terms may indicate automated spam.

An attack profile (or perpetrator) will look like one that is filled with exact-match commercial terms, or with pharma, casino, and adult anchors that have nothing to do with your business.  If your bakery site is suddenly being linked as “cheap casino bonus,” you have found a fingerprint. Check your anchor text report and flag anything strange that dominates.

Clue 3: A Traffic Drop After the Spike

This is the clue most people miss and one where the timeline plays an important role once again. Corroborate the timeline of events: when did the link spike begin, and when did your clicks and rankings in Search Console become wonky?

Compare the backlink spike with changes in organic clicks, impressions, rankings, and affected landing pages.

Check whether the decline overlaps with a confirmed Google update, technical changes, lost backlinks, seasonality, or changes in search demand.

Timing can help narrow the investigation, but it cannot prove that newly discovered links caused the decline.

The September 2026 update ran from September 24 to October 8, and a two-week window like that can muddy the crime scene.

Clue 4: Manual Actions or Security Issues in Search Console 

This is your strongest evidence. Check the Manual actions and Security issues reports because the former points to an issue Google has flagged on its end, while the latter indicates hacked pages or injected spam, which is a bigger cause for concern. 

Now, let’s ascertain how deep the waters are. Tick any of the following clues you found: 

☐ Referring domain spike

☐ Strange anchor text

☐ Drop that came after the spike

☐ Manual action or security warning

A couple of ticks only means you have a hunch, but not a full-blown case yet. Simply log it, save a dated export, and keep watching.

2 to 3 ticks means you’re getting somewhere, and you have a story. It’s a sign to keep digging.  

All 4 ticks mean only one thing. Ring the alarm: something isn’t right, and you need to act immediately. 

However, treat each sign as a reason to investigate. Two or three together tell a much stronger story. If the spike lines up with a drop and a Search Console flag, that is when you move to the response plan.

Pro Tip: Don’t forget to interrogate other suspects 

Before you move on to the disavow file, make sure to ask the following questions: 

1. Did a confirmed Google update roll out when the drop started?
2. Did anything change on your own site? Migrations, plugin updates, noindex tags, robots.txt edits, and redirect changes cause far more traffic losses than any attacker.
3. Did you lose links you used to have? A lost editorial link from a strong site can sting more than a thousand new junk ones.
4. Is anything wrong inside Search Console? A manual action or security flag changes the whole picture.
5. Does the timing fit? Real attack damage tends to follow the link spike, not the other way round.

If you cannot answer yes to the Search Console question or the timing question, you probably do not have a negative SEO problem but a diagnosis problem. It wasn’t the butler or the Ms. Scarlet in the Library with a wrench. 

Make sure to check the following numbers on a weekly basis: 

1. new referring domains
2. anchor text mix
3. indexed page count
4. Search Console alerts. 

Add email alerts in your backlink tool for sudden spikes. It takes ten minutes and gives you a record, which matters if you ever need to prove something to Google.

How to Respond to  a Suspected Spam Link Attack (Catching the Culprit) 

Now, the fun part. The grand reveal of the culprit. You cannot stop someone from pointing junk links at your site. What you can do is limit the damage and make sure Google has the right picture. Work through these steps in order.

1. Get Confirmation of the Attack

You’ve ruled out Google’s spam updates, recent site changes, and lost links. You don’t have any Search Console flags or a drop after the spike, which means you have no evidence of a crime; hence, no case.

2. Document Suspicious Patterns

Export the entire backlink profile and save it with the date. Screenshot the referring domain spike, your anchor text report, and your traffic trend in Search Console. If you have to send a reconsideration request or contact the host, dated evidence will be extremely useful. 

3. Lock Down Your Website

Hacked pages and injected spam do more real damage than outside links do. Think of it as changing the locks after a break-in. Here’s the security plan to make sure you don’t have a breaking-and-entering situation again: 

• Change the passwords for CMS, hosting, and FTP and turn on two-factor login
• Update plugins, themes, and core software
• Scan for unfamiliar admin users, strange files, and hidden links
• Check how Googlebot sees your pages, in case of cloaked content
• Check for unauthorized URLs, injected content, unexpected redirects, indexing directives, and compromised templates. Fix the underlying security or technical issue rather than assuming canonical tags will prevent malicious pages from appearing in search.

4. Request Link Removal First

Send a short removal request for any of the links that can be traced to a real owner, but do so with a grain of salt because spam networks are notorious for ghosting you. Do keep a record of what you sent, because it helps if you need to file a reconsideration request later. Yes, you are politely asking the villain to stop. It rarely works, but the paperwork counts.

5. Disavow Only When Justified

A sudden influx of spammy backlinks is not, by itself, a reason to upload a disavow file. Google generally recommends disavowing only when you have a substantial pattern of unnatural links and those links have caused, or are likely to cause, a manual action. If the links are unrelated to your own link-building activity and no such risk exists, monitoring is usually more appropriate than disavowing.

Disavow at the domain level only when you are certain, and keep a copy of every version you upload. Falsely accusing a good domain is how detectives lose their badge.

6. Report a Coordinated Attack

If you identify independently verifiable spam-policy violations, you can report the offending pages through Google’s spam reporting system. Do not expect the report to automatically remove links, resolve a ranking decline, or establish that your website was attacked.

Conclusion 

The best answer to negative SEO is a backlink profile full of links that earned their place. When you have a profile with relevant, high-authority links, it’s easier to identify junk links in the first place. 

A sudden wave of spammy backlinks can look suspicious, but it does not automatically mean your site is under attack or that your rankings are at risk.

Start with the evidence. Review referring domain patterns, anchor text, affected pages, Google updates, technical changes, and Search Console warnings. If there is no clear sign of an unnatural-link policy issue, monitoring is usually a better response than rushing to disavow.

Need help reviewing your backlink profile? Start with a backlink audit to identify suspicious patterns, lost links, and opportunities to strengthen your off-page SEO strategy.

Sign up for a free backlink audit or check out our White-label link building services to learn more about how to build a strong backlink profile.