A few days ago, ZDnet reported that some Bing search ads, i.e. adCenter ads, are leading to malware and viruses.
The author wrote that shortly after he notified Bing, Bing removed the ads. But he spotted more the next day. He wrote:
Yesterday, I showed you details of an ad on Microsoft's Bing search engine that led unwary visitors to a site serving up malware.
Several hours after I reported that ad to Microsoft, it was removed, and a spokesperson told me that Bing's ad network will "continue to directly work with our agency media partners to verify and confirm any suspicious orders."
Looks like there's more work to do.
This morning, I've found multiple ads on Bing that go through seemingly innocent intermediary sites to the same malicious server in Russia.
As many of you know, Google is big into malware detection. But sometimes, it can be really hard to detect and block in such an open auction environment.
Forum discussion at WebmasterWorld.