This indicates an attempt to access Amazon services.
Amazon is an American organization that provides electronic commerce and cloud computing services. It is one of the largest Internet retailer in US. Some of Amazon's online commerce services include books, DVDs, video streams/downloads, softwares, video games, apparels, furnitures, toys, electronics and self-produced technology gadgets. It also provides cloud infrastructures in Amazon AWS.
Note: When enabled with the default Amazon services signatures in the database, this signature detects the Amazon domains that are not covered by the default database signatures.