Huge malware campaign used Yahoo's ad network
 

You've probably heard of malware-laden ads causing havoc on the web, but rarely on this scale. Malwarebytes has discovered a malware campaign that was using Yahoo's ad network to target legions upon legions of visitors -- Yahoo's main site racks up...

http://www.engadget.com/2015/08/04/y...cid%3Drss_semi