5.50 rebuy - 13 left shortstacked

[king of the deck]

pretty straightforward question, do I raise, fold, or push here?

7 handed, 46k stack, blinds at 2k/4k with 400 ante.

UTG dealt A4 offsuit. Fold, Raise, All in?

Table image is rock. Fairly new to table, pushed a few times , only shown down once with KQ which was the best hand on flop. Other than that, not really mixing it up in many pots.

Other players are playing pretty loose-passive, even the big stacks are just limping any 2 about every other hand. Of the other 6 players, 3 have about the same stack as I, the other 3 have pretty monster stacks but have not really been trying to pick off players.

Hope that is enough info. Thanks for your feedback.