UA: Mozilla/5.0 (compatible; Primalbot; +https://www.primal.com;)
Protocol: HTTP/1.1
Robots.txt: No
Host: AWS
54.204.0.0 - 54.205.255.255
54.204.0.0/15
also using this UA from same range:
Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.2.8) Gecko/20100723 Ubuntu/10.04 (lucid) Firefox/3.6.8