I don't know of a great many projects named "curl", so I would have to assume that message is referring to this project
Before you download/install/etc., wheck to make sure you don't already have curl installed on your system. I would bet you do. If not, check rpmdrake (or whatever package management system you use) to see if you can install it. While you're there, install any "curl-devel" or similarly named packages. I honestly don't know if it would be in the -devel package, but it won't hurt to install it.
If after checking and installing anything that may be missing, try installing Acrobat again. If it still fails, then you may need to download and install the RPM from the project's website.
EDIT: Beaten to the punch... again. I really ought to start counting.