magick fails with "no images defined `evan.gif' @ error/convert.c/ConvertImageCommand/3322"

I downloaded, installed and checked ImageMagick. I tested the installation afterwards with no errors.

I try to test the installation with

convert -density 300 ~evan/data/test_file.pdf -quality 100 evan.gif

and I receive the following error:

convert: no images defined `evan.gif' @ error/convert.c/ConvertImageCommand/3322.

I made sure the file "~evan/data/test_file.pdf" existed.

I tried different output types, jpg, png and tiff but I received the same error.

HELP!!!