possible email scam
I recently received a notification of a subscription renewal, which I had no problem with, but today I received an email titled "Your Subscription Confirmation" which contains an attached PDF file. I was about to open this attachment when I noticed that the "from" field was shown as "App Store <*****@ summary-localdata3.com>". All of my past emails from Apple have been from some variant of "apple.com", so I hesitate to open this attachment. Are my suspicions valid? Or is the from address a valid one, and it is safe to open the attachment?
Thanks for any help!
[Email Edited by Host]
iPad (3rd gen) Wi-Fi + Cellular, iOS 8