Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7f7ee07f795db4…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 20:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ffc39c00439e485bef8bee13c153b30 SHA-1: 25052698388d47e4e0cc387f94d96be18b46e0c2 SHA-256: 6b7f7ee07f795db46c00176830c34123b2041bc8b40d9c3e382bb6e49d48d424
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One of the primary links, https://ttraff.cc/pify?keyword=tornado+generator+rimworld, is flagged as a malicious redirector. The document's structure and embedded links suggest an attempt to direct users to malicious or spam content, likely as part of a phishing or SEO poisoning campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/pify?keyword=tornado+generator+rimworld
    • http://files.osteo4bodytalk.com/uploads/1/3/1/3/131384101/kejik_bomiletedodame_fifogamibavo.pdf
    • http://files.mcmjanitorial.com/uploads/1/3/1/4/131406356/5b2cce2e6e7ba.pdf
    • http://files.nanonore.com/uploads/1/3/1/4/131436978/4e9e0e4edc6276.pdf
    • http://files.cupcake-couture.net/uploads/1/3/2/6/132683070/nakizudidefusilojis.pdf
    • http://files.winscombevillagebakery.co.uk/uploads/1/3/1/3/131382217/9326890.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/mafesuzaxobetadirapuwusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/sopomezozolan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/81808958321.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/47810983778.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/2142314682.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/gufivese.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/29592142976.pdf
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/xofusutolajitopamowix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/fibunibovil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/71521674290.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/xusolemilagikefamexul.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_off00006550.bin
d11e324e0caa780aed6a07d4f6d45cad9fc66954673924955eea609098144751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 5008 bytes
font_01_sfnt_off0000764f.bin
c045d35332e823c598b9659dc1cbf586c6807041fe145aa1450cc57e642a82dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764F 10444 bytes

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