Will buying a lower DR site hurt mine?

So I’m dabbling in the idea of domain redirects and boosting my backlink profile. Niche is the same. I have about 1400 links and 266 referring domains. My DR is 20.

This domain has 52k backlinks with 353 referring domains and a DR of 4.6.

With this sites rating so low, would it hurt my rating and lower my SERP results? Or does it simply add on top?