Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3c091c1361f40b…

MALICIOUS

PDF

38.2 KB Created: 2020-08-28 04:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb6b1436b0c098d427c5bac126b3e2af SHA-1: 22b80eb9c43e5ffc677f418aa1b70550013a20a3 SHA-256: 2d3c091c1361f40baa27200e7b6a2153685d2cc3f8e969feeed5684fdef3241c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one directing to a known malicious redirector. The document body, though partially obfuscated, includes the text 'A manual of engineering drawing for students and draftsmen' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=a+manual+of+engineering+drawing+for+students+and+draftsmen In PDF document text
    • http://raguxat.salmonriverwoodworks.com/uploads/1/3/2/7/132740214/zibimam.pdfIn PDF document text
    • http://files.anna-pearson.com/uploads/1/3/1/4/131408465/wilurugap.pdfIn PDF document text
    • http://vikuvibop.annasworlds.com/uploads/1/3/1/3/131383664/1855542.pdfIn PDF document text
    • http://files.dressagestars.com/uploads/1/3/0/9/130969472/f15daf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6387/0368/files/gexarorekapexuvokanaluku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9968/3735/files/es3_to_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/2020_calendar_weeks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/dieta_alcalina_cancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/tojuwita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/hybrid_renewable_energy_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/42633350784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/fake_marriage_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/78667962906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/wolotogodetoxo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5947 5308 bytes
SHA-256: 85f3a713c34add3278cc5498f9051a283d7acea705da2c0973b35665a04e58e6
font_01_sfnt_off00006b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 9336 bytes
SHA-256: 22a524f5cdb7ff79bebbbbd8c8bbd730ad720fcef3bbae3cb59f86d43cd04d5b

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