Hi wiisikke
Have a look at
Underscore Notify. I use it to make freehand drawings, but also as a way to link PDF and MS Office docs, etc. to my actions when I'm away from my desktop.
It incorporates
Send to OmniFocus which puts a live link in the notes field of an action, a quick tap and OF launches Notify and opens the relevant notebook. The long-suffering developer (my endless feature requests!) has agreed to modify this so that in the next release the App will return to the actual page in a notebook where StO was triggered, rather than just opening the associated notebook.
I'll probably continue to make use of Notify even when Document Interchange is added into OF, as a way of keeping my OF database down to a manageable size and avoiding lengthy sync times.
Hope this is helpful.