The head of Google’s Web spam team says that the company has pushed warning messages to some 20,000 Web site owners that their sites may be compromised and are performing “weird” redirections, possibly to malicious Web sites.
A search turned up only a handful of non-english Web sites displaying the warning text, though Cutts said that 20,000 Webmasters received the notice.
It’s not the first time Google has taken action to weed out compromised Web sites from those that may turn up in search results. In July, 2011, the company removed Web sites hosted on .co.cc free Web hosting service from its search results, saying that because such a large percentage of the sites on that free hosting provider are low-quality or spammy.
Studies have shown that, despite the company’s best efforts, malicious and suspicious Web sites are often able to use search engine optimization to slip past Google’s filters and wind up on search results lists, and that the search engine giant flags only half of all the malicious links rendered by its search engine.