Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4f34def6b99876…

MALICIOUS

PDF

50.6 KB Created: 2020-08-02 19:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d85fbe51552c3076f01f48b827dc24c0 SHA-1: c54989b9d7b229e35b12f7ad75ec505443a666c8 SHA-256: 0b4f34def6b99876916e5d1b29d8fe0d8f040c8a70b42af2423dd1e666402795
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to `https://ttraff.com/pify?keyword=tarkov+ammo+guide`, suggesting a phishing or scam attempt disguised as an ammo guide. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links indicates a link farm for SEO manipulation or traffic redirection. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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=tarkov+ammo+guide
    • http://files.sashafleary.com/uploads/1/3/2/6/132695321/13b49f7a6d896.pdf
    • http://files.thomasmccartypromotions.com/uploads/1/3/2/6/132681452/888470.pdf
    • http://files.sgtnatefitness.com/uploads/1/3/1/6/131636632/4607657.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/lossless_compression.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/batubobitoxoparoluseso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/miller_syncrowave_180.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/tarubawapate.pdf
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/tufujiwaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/88080854116.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/taekwondo_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/10056552003.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/4856_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/pexobugozotafido.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/20329018492.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/javibusubo.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_off00008319.bin
3b9059faff035e2bf3566f4c4e2bcbeaf8ff2bb3ffa0d107365bc641d98d41ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8319 5008 bytes
font_01_sfnt_off00009413.bin
873c787ec505f4f63545720116492fdfe8b4f6703bdeaa8bd9a1e8b93dfd44e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9413 13392 bytes

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