Multipage tiff conversion to PDF problem

[edc]

Hello!
When I convert some multipage TIFF to PDF, I got pdf file with blank pages. TIFF example is here (deleted)

ImageMagick 6.4.2 07/26/08 Q8 for win32

Same problem if I convert with libtiff-tools (version 3.8.2-7 linux) and http://www.pdfonline.com online converter

[magick]

The image appears to have bogus resolution information. Try this command:

• convert 50003179251.tiff -density 72 50003179251.pdf

[edc]

Thanks for quick answer!