Trying to load this site will effectively attempt to insert and report a tracking cookie, but the report given by my antivirus is not just this cookie (trackign cookies are easy to eliminate), but the fact that the ad displayed is featuring a malicious Javascript, atetmpting to exploit some system security issues.
Read the report about JS.pdfka.bs. effectively, the javascript attempts to redirect the ad to another site hosting a dangerous malware.
So please TPU, report this issue with your advertizing providers so that they block (and fine) this abusive advertizer for abuse of contracts. And consider yourself choosing better advertizing programs that are better verified. It is not acceptable for any ads you are refering to from a site to include any random redirect. In fact, you should proxy ALL your ads yourself, through your own server that will verify its contents and format, and cache it before sending it to your visitors. For the tracking cookies that some advertizers want, also make sure that they are ONLY single downloads of a single pixel image (disable all active components downloaded in response for this cookie, like Javascript and Flash: include an isolation mechanism to protect your visitors, or propose to your advertizers to host this cookie yourself: give them back only digested lists of cookies: those advertizers NEVER need to know anything else than a unique user id, a date of visit and the base URL of the visited page: these cookies should only be used for computing statistics and enhancing their products or measuring how their ads are perceived and if some people are clicking on their banners to follow the link to their sites: this impact determines the price they are ready to pay you for these ads, but NONE of your visitors should be forced to download active components on their PCs)
Consider also subsribing to a serious security inspection company that will alert you immediately in the case of one advertizer abusing your contract and site usage policies: you should be able to plug it off immediately, otherwise your visitors will claim to you fees for damages).
