One astronomer Hongjun stated, "We don't know if the hand shape is an optical illusion." But he did not it does have fingers a wrist and looks like a hand grabbing an object.
Sure a pulsar made it, but the question I am posing is...was it created on purpose by an alien race? Its a great way to leave your species mark on the universe and let other species know that not only does your species exist, but that you were in that area first and have dibs.