That's super odd. I've been using 4shared for years! Maybe its a location thing? Nonetheless, ill clear up some space in my dropbox.
EDIT: Just updated the links to dropbox, that's really odd that you guys are getting malware sites from 4shared, there have always been google ads on the side of the page, but never anything too serious. Nonetheless, the link is updated, hope you didn't get anything too bad!
Also, I'm not sure if I stated this previously or not, but I reside in the US so my time is a little off from your guys' time. This post seems to be posted at 1AM on the sites time, but its actually 8AM on my side, so updates may be made during some odd time stamps.