Are there any references to Jesus / the Messiah in the OT apocrypha?
Not part of my definition of apocrypha, but reading Wisdom leaves you with a distinct feeling that that the messiah is coming and he's going to be very badly treated.
I won't post all of Wisdom 2 here, but make sure if you read it, that you don't cut up the verses, these are bad people talking bad things about a righteous Man.
(Wisdom 2:1 NABRE)
But, basically, as some English monks point out, the entire Bible points to Christ in some way:
*I know these aren't 100% Deuterocanonical, but they're in here for completion.