Is frost build-up normal at the ingoing/outgoing pipes to the freezer evaporator?
This can indicate a few possibilities:

1: You are low on freon - this means you have a leak.

2: Dirty Coils - bad cooling- causes the pipes to freeze up like in your picture. Check your condenser coils.

3: No Airflow - your fans on the evaporator inside are not working causing this same condition. Also check your fan from Fridge to Freezer ..

Check items 2 and 3 First.

EDIT 

As was pointed out - I did not answer the question directly.

The Op Asked  Is this normal?

The direct answer: No this is not normal.