Yeah, they're almost certainly using CloudFront.
notriddle@DESKTOP-IIQA1VP:~$ host souqcdn.com
souqcdn.com has address 46.137.109.63
notriddle@DESKTOP-IIQA1VP:~$ host 46.137.109.63
63.109.137.46.in-addr.arpa domain name pointer ec2-46-137-109-63.eu-west-1.compute.amazonaws.com.