Well in case you are interested, I did a little bid of poking around and below seems to do what you require:
Code:
#!/bin/bash
for full_url in $(< urls.txt)
do
# remove the protocol
url=${full_url#*//}
# extract the host
host=${url%%/*}
date=$(date +%s)
wget -O "${host}${date}".png --user-agent="" "pdfmyurl.com?url=$url&--png&--page-size=A1&--redirect-delay=500"
done
This is based on the url file you showed previously.