According to some the tradition that the tomb was known and was empty is considerably older than the Gospel narratives that have been built around its discovery. The insight of faith shaped the narratives of the discovery of the tomb. The revealed solution to the ambiguity of the empty tomb, that it was empty because Jesus had been raised, was incorporated into these narratives by the intro of one or more angels who proclaimed; 'He was raised'.
Chariton’s novel Chaereas and Callirhoe involves the heroine falling into a death-like coma and being buried in a tomb. She wakes up when grave robber pirates raid the tomb. They sell her into slavery. Her tomb is later found empty. But the heroine is eventually reunited with the hero.
The date of the novel being written has been estimated anywhere from the middle of the 1st century (based on a possible reference to a portion of the title) to the late 1st century or early 2nd century (based on vocabulary) to after the first quarter of the 2nd century (based on possible influences on it from other works) to as late as the 6th century (based on style). See Chariton - Wikipedia.
If we take the earliest estimate, it is possible that Mark may have been influenced by this novel, since he appears to have written shortly after70AD. If we take any of the other date estimates, it is possible that it is the other way around, that Chariton was influenced by Mark.
Nonetheless, the idea that Jesus rose from the dead was around well before Paul wrote in the 50s AD as everyone he wrote to already seems to know about it, if not necessarily to have believed it. Chariton may have influenced Mark’s portrayal but it is not the origin of the resurrection story itself.
Since Chariton’s novel ends with the heroine being found, the question arises that if Mark’s ending is just fictional why does he not make up a story about people finding the risen Jesus? All the later Gospels do. An early tradition about an empty tomb and someone claiming Jesus rose from the dead. (an element missing from Chariton) works well as the origin of the resurrection story.