Maybe Adobe's Acrobat Reader team would be interested in this:
Starting with Linux Fedora-29 and forward there have been some problems with installing Adobe's Acrobat Reader 9.5.5-1 using the Linux 'dnf' command with AdbeRdr9.5.5-1_i486linux_enu.rpm. The problems are described here:
Adobe's Reader team would not be the least interested, I fear. Acrobat 9 reached end of life and end of support in 2013. In Mac and Windows there were many new versions and hundreds of fixes; the team did not keep looking at Adobe Reader 9 in Linux. There have been Linux install problems for many years.