Hello Shivlu,
I may be wrong but I don't see anything that needs to be further decoded here.
I agree these are strange IP addresses that shouldn't be seen in a network.
try to understand if these packets are real look for ARP entries and try to locate the devices that are using them.
Just an idea: they could be the result of two IPv6 hosts trying to auto-tunnel over IPv4 addresses and using the least significant part of IPv6 address as the IPv4 address.
Hope to help
Giuseppe