Scammers bypass Google filters with PDF cloaking

Scammers stuff PDF documents with junk to help with SEO

Become An Insider

Sign up now and get FREE access to hundreds of Insider articles, guides, reviews, interviews, blogs, and other premium content. Learn more.

Scammers have long used cloaking as a technique to drive up search engine rankings, stuffing webpages full of keywords and links that make them attractive to Google, but not to actual readers.

Google wised up and those tactics became ineffective. But, according to a new report from SophosLabs, there is one twist on cloaking that still works, and that is to stuff those keywords and links into PDF documents instead.

"It is our supposition that Google has not protected PDFs from this type of search engine poisoning the same way it has with HTML files," said Maxim Weinstein, security adviser at Sophos.

To continue reading this article register now

Shop Tech Products at Amazon
Notice to our Readers
We're now using social media to take your comments and feedback. Learn more about this here.