Do you need further proof that advertising is intrinsically evil? I'll wager not, especially in the case of the obviously idiotically managed, and therefore open-to-exploitation Yahoo Ad Network. It's one exploit after another for these poor fools... Profoundly and Blatantly Stupid.
'In January, for instance, Fox IT reported that visitors to Yahoo’s website were bombarded with malicious adverts that attempted to infect computers with a wide array of financially-motivated malware. Later in the same month, there were claims made that Bitcoin-mining malware had been spread via Yahoo ads...' via Graham Cluely