To be fair; that kind of stuff happens when you run ads on websites.
Usually, you partner up with an ad company that shows rotating ads. You put it on your website to make some extra income off clicks & impressions.
Sometimes, the company who's running ads can get hacked or infected with malware.
Most large ad companies are supposed to weed those bad ones out before they do damage.
In this case, one of the ads has been reported as malware and the ad provider that AMWX uses, hasn't removed the bad image/url yet.
We are still using Google Adsense here, which is very well moderated. We will be switching in the future, though. We'll try to avoid this issue at all cost.