Subject of Email:
Your flight ticket number: #D17D7B648C
Content of email:
Dear (first part of email address)
Your flight ticket number: #D17D7B648C is not activated yet!
In order to activate the ticket (confirming your identity) please download the attachment and follow the instructions.
Please print the confirmation and present it at the check-in point at the airport.
Attached is a zip file called something like British_Airways_eTicket-D17D7B648C.zip
The so-called PDF file inside actually installs Malware on you computer