Canon CAPT Driver v2.4 was to be download from a link posted here, but when I write this the link is dead.
I had the driver and have uploaded it here.
But I suppose the driver and even a newer version should be available. Is it?
The latest version of the Canon CAPT Driver is version
2.5 2.7. You can find information about the driver at the Canon CAPT Printer Driver for Linux Version 2.xx webpage. The link to download the driver is the red word Download at the bottom of the same webpage.
The instructions for installing the Canon CAPT Driver v2.6 in Ubuntu 14.04 are found at the Ubuntu Canon Capt Driver wiki under the Ubuntu 14.04 Install heading.