Warning! Shannon Rail Services
Yet another in the current round of fake eMail containing links to infected files, pretending to be invoices. In this case the sender is alledged to be Shannon Rail Services, but in fact the sender is jinacogroup{dot}com which is an IT company, based in London. Probably means that they have had their email hacked or spoofed.
However, the invoice link does point to this company's and is without a doubt an auto-running php file that will infect your computer with malware or worse, encrypt your files.
As ever, never click a link in an unexpected email, especially one that you are not expecting nor from a firm you've never heard, these days, it'll be an attempt to scam you or infect your computer.