Malicious PDF — malware analysis report

Static analysis result for SHA-256 303b95893c0d974d…

MALICIOUS

PDF

37.1 KB Created: 2020-08-22 09:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b8432ec6e2e1b43cce914dccd492a3 SHA-1: 8f1b3b6a38c3378a1fc73ebbff49672875198046 SHA-256: 303b95893c0d974de4cee29b24f9503053ef04cc82abf5762cc52fa465e04fa3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, ttraff.com, with a query parameter suggesting a lure related to 'seven little words game answers'. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=seven+little+words+game+answers
    • http://files.weisshockeytalk.com/uploads/1/3/0/9/130969966/2192297.pdf
    • http://files.elinorpenna.com/uploads/1/3/1/3/131398360/2798730.pdf
    • http://files.artbytobias.com/uploads/1/3/2/6/132695525/f6c7e89d4.pdf
    • http://fuzudiz.pillagerboosterclub.com/uploads/1/3/0/8/130873830/dusobemat.pdf
    • http://files.ndsportschannel.com/uploads/1/3/0/8/130813645/70c5ad48ccba3.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/disotul.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/gta_san_andreas_bike_cheats_pc_full_list.pdf
    • https://cdn.shopify.com/s/files/1/0463/2595/6765/files/inscribed_and_circumscribed_polygons_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/minecraft_gameboy_advance.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/83866526848.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/91564834023.pdf
    • https://cdn.shopify.com/s/files/1/0430/0898/3203/files/21876670014.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/35467939648.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/18780314535.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/kiwutiziwafaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005242.bin
b1376e6e0062cec7e8ddc92469edff8e463af307113a41ec880cb6bd26ba8796
pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 5400 bytes
font_01_sfnt_off00006499.bin
d9c5f9f012a140f570a5838238c376d044195756af8963f71317790544be119f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 10252 bytes