What's happening isn't a virus. Ad servers occasionally serve up links that are designed to redirect your browser to a given website or to open a new window to their site. The ones hitting AW right now seem to mainly be from brokerltd[dot]com[slash]ads and maha-media[dot]com[slash]ads. It's hard to catch the inital URL because it immediately redirects to a second URL, which in turns redirects to the one that's annoying everyone, but I got both of those this evening.
It's not the ad server doing this; they're being made to look stupd by the people abusing their service. Once the ad company knows they're being used like this, the offending links will be removed from the rotation.
Assuming you have basic protections in place, like no automatic downloads of any kind, and you never, ever click any button on the page, you shouldn't have any problems except the annoyance.
Editing to add: Turning off java script will also stop the problem. At home I usually have it off by default, but I ran into these ads at work today, so I knew about them. I had to wait till I got home where I was able to catch the URLs, and now I have scripts turned off again so I can finally read the forums.