It's not clear to me what you are trying to accomplish.
You appear to be writing a file to a raw device. Unless the file is a disk image appropriate for that kind of device, this makes no sense to me.
The Fedora-Live ISO is a SquashFS file system, not a binary or raw image suitable for dumping to a raw device.
Since this is a Fedora-Live ISO, I'm guessing that you want to create a bootable USB vice the bootable DvD you'd get from simply burning the ISO to a DVD. There are standard tools for doing that such as: Unetbootin
****** edit *****
OK, I pulled down the ISO file and did an fdisk of the ISO.
fdisk Fedora-Workstation-Live-x86_64-31-1.9.iso
Command (m for help): p
Disk Fedora-Workstation-Live-x86_64-31-1.9.iso: 1.8 GiB, 1929379840
bytes, 3768320 sectors Units: sectors of 1 * 512 = 512 bytes Sector
size (logical/physical): 512 bytes / 512 bytes I/O size
(minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk
identifier: 0x6f869649
Device Boot Start End Sectors
Size Id Type
Fedora-Workstation-Live-x86_64-31-1.9.iso1 * 0 3768319 3768320
1.8G 0 Empty
Fedora-Workstation-Live-x86_64-31-1.9.iso2 172 21887 21716
10.6M ef EFI (FAT-12/16/32)
Fedora-Workstation-Live-x86_64-31-1.9.iso3 888 67407 45520
22.2M 0 Empty
The ISO defines 3 partitions of which 1 & 3 are Type 0 Empty.