
Agree with Louise. And anyone saying that a pup "looks evil" knows nothing about dogs. It's sheer excitement when they are playing, because that's all it is. Play biting. It's how the pup played with its siblings, but now it only has you. No such thing as an aggressive puppy - it's just being a dog.
The link you have been given is a good start to understanding that canines don't behave like humans, and it's unfair to interpret their actions as if they are human. You need to show the pup what is required of it, with reward based training.
So your answer is definitely - YES, perfectly normal puppy!