Villain who continued postflop is 15/2 over 100ish, pretty passive.

PokerStars No-Limit Hold'em, $0.05 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP2 ($2)
CO ($5)
Button ($8.28)
SB ($1.81)
BB ($9.62)
Hero (UTG) ($5)
UTG+1 ($11.25)
MP1 ($6.94)

Preflop: Hero is UTG with A, Q
Hero bets $0.30, 2 folds, MP2 (poster) calls $0.25, CO (poster) calls $0.25, 2 folds, BB calls $0.25

Flop: ($1.22) A, 5, 7 (4 players)
BB checks, Hero bets $0.75, 2 folds, BB calls $0.75

Turn: ($2.72) 4 (2 players)
BB checks, Hero checks

River: ($2.72) 3 (2 players)
BB bets $1, Hero?

My guess is his range is pretty tight here though he could be bluffing the 4-straight which he obviously doesn't have. At worst he has AJs I guess..looks like a fold?

Thoughts on line from preflop on?