Let's approach this from what's missing and maybe get a clue?
The instructions say: "Assembling those 15 PDFs will get you access to the 100+ cards, Character Cards and rules for the Shadowrun: Crossfire Demo Box."
Rules say 2-4 players for the Demo, so must have 4 character sheets.
4 Role cards
Starting cards (Mana, Mark, Quick Shot, Street Smarts)
Black Market cards
Obstacle cards
Crossfire cards
01/15: 8 Crossfire cards
02/15: 8 Obstacle cards
03/15: 8 Obstacle cards
04/15: 8 Obstacle cards
05/15: MISSING
06/15: 8 Black Market cards (includes Mana & Mark starters)
07/15: 8 Black Market cards (includes Street Smarts, Quick Shot, Mana & Mark starters)
08/15: 8 Black Market cards (includes Street Smarts, Mark, Mana & Quick Shot starters)
09/15: 8 Black Market cards (includes Quick Shot, Mana, & Street Smarts starters)
10/15: 8 Black Market cards (includes Street Smarts, Mana & Quick Shot starters)
11/15: 4 role cards, Demo Kit Rulebook pages 1-4
12/15: MISSING
13/15: 2 character sheets (Elf/Human)
14/15: 2 character sheets (Troll/Orc)
15/15: tokens
Maybe 5/15 cards (Obstacle or Black Market?)
Maybe 12/15 the last part of rulebook?