Yeah, a little. It doesn't stand out nearly as much as 3% PFR though.
Basically he looks like a pretty standard type of player who is repeatedly calling without odds
and/or is c/c'ing with strong hands out of "fear of being outdrawn" or suchlike. Hence the river AF% being higher - he can't be outdrawn on 6th street, so he finds his bet/raise button.
Of course this is all just educated guesswork - there's only so much one can infer from a 15k stat sample at 2am.