We have been receiving continuous spam from various address hosted on Amazon Web Services and they are sending links hosted on https://storage.googleapis.com as can be seen from the links to the reports below
https://www.spamcop.net/sc?id=z6609711481z5f7ff7906030421d35c28ec4fd76ebdfz https://www.spamcop.net/sc?id=z6609711460z56c0fcbe123772538e3e59d397f1debbz https://www.spamcop.net/sc?id=z6609483256z97380f1a15232897ee82cee7d6f091c0z https://www.spamcop.net/sc?id=z6609366126zdb94260fe772eeaeec0b586ccc824df9z https://www.spamcop.net/sc?id=z6609256707z4d8a52a2186b2f32c75f647c6fbe356dz https://www.spamcop.net/sc?id=z6609256623zc4514931da5788b2acde16bd1ef32c52z https://www.spamcop.net/sc?id=z6609256487ze5debd3a12045f5132105bd9b86e0a44z https://www.spamcop.net/sc?id=z6609255536z1bc66246264b337428f3bd9706d31cf8z https://www.spamcop.net/sc?id=z6609076508ze91cae8abe953370fc6a3018c2562c80z https://www.spamcop.net/sc?id=z6609076340zed79e13a21d4a2001db92feb8acfe294z https://www.spamcop.net/sc?id=z6609076325z8328d3171b85f6a300450172203866fdz https://www.spamcop.net/sc?id=z6609076302z163fdb001049a51856327793ed961f5fz https://www.spamcop.net/sc?id=z6609076156z3366ccef95b77d0d76ac7412e7bf677dz
any idea how do take care of this and stop the spam source ?