Twice now I've opened a page and immediately had an exe downloaded to my machine. Both times I was running Windows 8.1 with Chrome v34. The second time, I was on this page:
Also this second time, the file downloaded was "flashplayerpro_Setup.exe".
I honestly don't know if it is caused by ads or not (I never click on any), but it has never happened on any other site. Here is the screenshot of the page (only one ad, and once again, I'm not sure if it was the cause):
Spoiler
The first time it happened was 3 days ago (different url, I forget), and an exe called "update.exe" was downloaded.