Для openSUSE Factory запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Publishing/openSUSE_Factory/Publishing.repo
zypper refresh
zypper install qpdfview
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Publishing/16.0/Publishing.repo
zypper refresh
zypper install qpdfview
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/Publishing/15.6/Publishing.repo
zypper refresh
zypper install qpdfview