A pcap file is given here for analysis. check type using
# file weird_shark.pcap_f5f1e42dd398f18c43af89ba972b3ee7 weird_shark.pcap_f5f1e42dd398f18c43af89ba972b3ee7: pcap-ng capture file - version 1.0
Open the file using wireshark, but no luck, wireshark reports malformed file format and refuse to open it.
So we need to extract the packets inside manually.