This is a follow up to the numbers I presented in
Part I, which discussed malicious spam pages in Google results and the malicious that sites they redirect to.
Google warningsThe number of spam pages which are flagged by Google represent only about 44% of all spam identified by Zscaler. If we look at spam pages redirecting to a malware, 57% are flagged. These numbers are about the same as what we saw in
March 2010 (53% flagged).
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52% of the malicious spam links are flagged by Google |
Distributions of spam links per pageSpammers are still able to elevate their links to the first page of search results. However, compared to
March 2010, there are fewer spam links on the first page than there used to be.
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Number of spam links on each result page in Google |
In general, more search terms contain Blackhat SEO spam links, but there are fewer such links per search, when compared to
March 2010.
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Number of spam links per poisoned search |
Overall, Google's Blackhat spam SEO situation has improved: there are fewer spam links on the first page and fewer search terms had more than 50% of links returned as malicious. However, Google still struggles to clean their index, or at least to warn users about real threats.
-- Julien