[RiverDood]

This strikes me as exactly the way a weaker player would handle A8 or A4 that just made two pair.

Villain would limp UTG with such a dubious hand in the first place (especially if suited); call Hero's small preflop raise with a dominated hand, and then try to trap on the flop.

I realize at higher levels this shouldn't be happening. But everything in the read suggests that we're seeing someone with more rudimentary skills and strategy.

In that case, Hero is drawing very thin and should let go