Anthony,

There are some restrictions on what EMIS is able to receive at present, they are still in the process of rolling out further FHIR support. That said, I believe you should be able to send a PDF file via MESH/Kettering XML, you may just need to change the document type for it to be displayed correctly within EMIS. 

If you need further assistance, please feel free to reach out to me directly, I'm sure we can assist you with this.

Regards

Jon Payne