I don't remember any apparent way to do it other than a UNIX shell... Maybe get MSYS and use that (outdated) bash to help?
Here is a bash script that can use after you installed bash from MSYS (or you can sort it with a Linux box - Ubuntu is no bigger than 800MB and can run as LiveCD without interfering your current Windows system, and the LiveCD can double as a system saver when needed. :-)
#!/bin/bash
for each in ./*; do
if [ -d $each ]; then # Only folders are minded.
# Extract the second part of the folder name.
ACCOUNT_NAME=`echo $each | sed "s/\\-/\n/" | head -n 2 | tail -n 1`
cp -v ./$ACCOUNT_NAME*.pdf $each
fi
done