How to open files with forward dash in linux
Turning my comment into a bit of a possibly useful answer. Try renaming the file.
ls -i
Will give you the inode number of the file. You can then use a combination of find and mv to rename the file as follows:
find . -inum "inode-number-from-ls -i" -exec mv {} "newfilename" \;
Give the file a "normal" new file name and you're good to go.