There is no domain name associated with the IPs.
Most importantly, usually, DDoS attacks use infected devices (PCs, mobile phones, smart fridges, shady browser addons etc...) to get many ip addresses and devices/locations and attack from everywhere at once.
There is no way a DDoS on the website in affecting the crawler. Also, running a DDoS attack of this size costs a lot of money (if you rent the network, if you own it it costs money as lost sales). No one is giving AI control over a DDoS network to just fuck around.