Can someone tell me is this killer using a perk or is he hacking?

I met a killer trapper i swear i didnt step on any of his trap but he instantly down me with one basic attack even when I'm at healthy state. Lucky me I have recorded a video when streaming to get developers look into this. Skip to 13:40 and the fun part is about start

https://www.youtube.com/watch?v=1K2eNbMq4cU


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