Poker Stars, $0.02/$0.05 No Limit Hold'em

SB: 249 BB
BB: 102 BB
UTG: 110 BB
MP: 123.5 BB
CO: 100.5 BB
Hero (BTN): 104.5 BB

Preflop: Hero is BTN with K T
UTG calls 1BB, 2 folds, Hero raises to 4BB, 2 folds, UTG calls 3BB

Flop: 9.5BB 3 8 2 (2 players)
UTG bets 1BB, Hero calls 1BB

Turn: 11.5BB 8 (2 players)
UTG bets 1BB, Hero calls 1BB

River: 13.5BB 7 (2 players)
UTG bets 1BB, Hero?

v is unknown, on river if I call Im rarely good at SD, dont really want to fold obv. So I thought raise to get him to random A highs 44, 55, 66 maybe 3x... not too sure how to asign him a range though and if he has enough hands in that range that beat us which will fold to a raise.
There's like 400ish people in the zoom pool on avg when I play so i dont think an argument to call for info can really be made.
Do you play any street differant? thanks

Edit: actually have some info on villian which i didnt notice at the time but heres the note caddy notes. After 4 hands vpip: 50 Totlimp: 50

http://i.imgur.com/cYV3LaZ.jpg