Cybercriminals are disguising their Trojan horses by sending them out attached to emails claiming to come from legitimate organizations. One of the malware campaigns pose as communications from WorldPay, claiming that your credit card has been charged on behalf of Amazon. Of course, if you havent bought anything on Amazon lately you might be all too tempted to click on the attached file (named WorldPay_CONFR.zip) which contains a copy of the invoice file. The invoice file is attached to this message, and will inform you about delivery.”]
Source: https://grahamcluley.com/worldpay-card-transactions-carry-malware-danger/