Unfortunately you cannot include attachments. This is come on most email automation systems.
If you can make the document a link by hosting it somewhere online, you can stick that link in an email as a hyperlink linking to open your document in a web-browser tab.
The other good thing about that is that you can track links clicked but you cannot track attachments opened.
In other words, you will never know who opened your attachments but we can tell you exactly who clicked on the links to open your document and you can then use that data figuring out who you should call or pursue.