got hacked?

I am tracking what people click or view on my site and I noticed two links that people viewed on my site… that aren’t on my site. Both look to be some sort of ads, both in chinese. neither have anything to do with my site nor do I have anything to do with ad networks that they are supposedly being showed through. One network is tenpay and the other is all4ad dot cn. has someone placed ads on my site without my knowledge? I can see any of those ads anywhere. can’t figure out what it is.