Conversion of pdf files to keynote file format

You can find a really nice utility for Mac called PDF to Keynote that allow users to export presentations in PDF format (prepared for example in LateX) to Keynote's KEY presentation format. The older KEYNOTE format is probably no longer supported in the converter, but the latest KEY format works just fine. Except for that, there doesn't seem to exist any other way how to achieve pdf to keynote conversion directly.

Open PDF file    Open KEYNOTE file