So here we have it: "Follow the Money: Where Do International Contributions to the Palestinian Authority Really Go?"
This is the full 40 page IDF report, including “an explanation of captured original Arabic documents (with their English translations)” detailing “the mechanism of this multi-million dollar money-laundering operation that has turned international humanitarian aid into support for terror and suicide bombing.”

According to the report, “by keeping a double set of books, the Palestinian Authority has systemically channeled at least 14% of its public budget, as stated to the IMF and donor states, to Fatah, other terrorist organizations, and various covert destinations”.

“Analysis of the documents captured shows that double-accounting practices enable the PA to redirect funding to PLO and Fatah apparatuses that were supposed to have been disbanded after the PA was established. Some of the documents described in this report prove the connection between PA financing of the Fatah/Tanzim, and suicide bombings and other terrorist attacks carried out against Israeli civilians”.

Care of the Jerusalem Center for Public Affairs (which was originally pointed out to me by Nikita).