Bizarre overbet from new player

[Proofrock]

$1/2 on Stars. This is Button's 3rd hand at the table. No reads at all, but he folded his BB and SB. Effective stacks $197.

Folds to Button who bets $70. I'm in the SB -- what's a good jamming range here (I'm jamming any hand I'm playing of course)?

FWIW, later on his standard raise seemed to be to $7 with no limpers. I had a pretty decent hand but didn't jam for the following reasons:

(1) No read, but he folded his blinds so he's a little less likely to be a total maniac.

(2) It sort of looks like a botched fake "misclick" bet -- I could buy $76 or $78 maybe being a legitimate misclick, but $70 has to be intentional. Since $70 makes no sense with any hand (except maybe an idiot playing AK?), I think it increases the possibility of it being an angle shoot.

I may be overthinking this though -- I've found myself to be thinking things through more carefully now that I've dropped down to 4-6 tables, which may actually be detrimental in some situations.