Without the -verbose, will remove the listing afterwards and should work just fine to make your images as
convert mydocument.pdf images%02d.png
Example:
convert rose: rose: rose: rose.pdf
identify rose.pdf
rose.pdf[0] PDF 70x46 70x46+0+0 16-bit Bilevel DirectClass 1.39kb
rose.pdf[1] PDF 70x46 70x46+0+0 16-bit Bilevel DirectClass 1.39kb
rose.pdf[2] PDF 70x46 70x46+0+0 16-bit Bilevel DirectClass 1.39kb
Thus a 3 page pdf file.
convert rose.pdf rose_%02d.png
produces three png images, one from each of the PDF pages.
rose_00.png
rose_01.png
rose_02.png