You'll need to use convert tool from the imagemagic suite.
convert -density 450 -quality 100 file.pdf foo.png
And you'll get image for each page.
Since by default convert created image files with low resolution, after too much googling I found that you need to fiddle with density and quality switches.
How to extract tables from pdf-s
Extracting tables from pdf files is hard, as in pdf there are not tables, just lines and letters.
I use this tool, it is able to extract most of tabular data and recovers structure very well.
Downsides are that it is painfuly slow (launches a process to extract each cell).