There are obvious spelling mistakes that should alert users to the bogus nature of the email, but a lot of people - "blinded" by the legitimate looking graphics - don't regularly check for those.
The offered links take the victims to compromised sites that host the Blackhole exploit kit, and once it does its thing, they are unknowingly served with a variant of the Cridex information-stealing Trojan, currently detected by a little over half of the AV solutions employed by VirusTotal.
This is not the first email spam campaign impersonating an airline, and it won't be the last. Fake flight reservations and e-ticket verification emails are sent out every day, as the cost of doing it is small and easily recouped - in fact, the amount is surpassed many times - when even an extremely small percent of recipients fall for the scheme and get their computers infected.
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