I don't understand where you are getting the command you are trying to run. If you want to use the cartreflect service, then using the documentation found here I believe the command would be:
rhc cartridge-add https://cartreflect-claytondev.rhcloud.com/github/openshift-cartridges/openshift-papertrailapp-cartridge?commit=master&r=1 -a test
If you just want to install the cartridge directly, then just use the command they give you on the project's GitHub page:
rhc cartridge-add https://raw.github.com/developercorey/openshift-papertrailapp-cartridge/master/metadata/manifest.yml -a test
If you are having trouble then I would recommend reviewing the three rhc commands they give you in the cartridge documentation.