[zrail]

I do this by putting the PDFs in the same git repo as my ledger file, and then adding a filename to the entry as metadata:

  2015/11/04 * (12345) Walgreens
      ; receipt: /receipts/12345.pdf
      Expenses:Medical:RX          $10.00
      Liabilities:Credit Card

It isn't an attachment, strictly speaking, but you can get at it with scripts and such.

[flatM]

That sounds simple and effective. Thanks.