Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c08eb80c6fb56f0…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 00:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c88b9e77ddb218b137ec0f8126e7c0 SHA-1: 2452a9bf6a3209207e38d6a6998a701da190346f SHA-256: 7c08eb80c6fb56f0cb8d0876615edb0693ac951ec3851a57043873763b306e04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The primary malicious IOC is the ttraff.com URL, which is likely used to host phishing content or distribute further malware. The document body itself is heavily obfuscated and contains a mix of seemingly unrelated text and URLs.

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=android+9+can%2527+t+hide+navigation+bar
    • http://files.followtheleaderedu.com/uploads/1/3/2/6/132695258/jalazekedida.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/16403015388.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/44983512735.pdf
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/88762132988.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/unity_flip_normals.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/miscreated_how_to_make_a_server.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/30857741461.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/61700646551.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/43255150192.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/rewawubikafazare.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a77.bin
78ab437905d2dab500bd4ca537f3930622b6f339f4e6daa70e35a10898dcfd4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A77 5372 bytes
font_01_sfnt_off00006cbb.bin
5dd75b716adf0df3e0892f785071fb3c0f106d614ad078d0557620fe3a20549e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 10476 bytes

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