Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26b1a4ba58debe9…

MALICIOUS

PDF

94.0 KB Created: 2020-09-18 18:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1e43d4f59f7a6c56e0f2a5d862224c2 SHA-1: fdd6166de0274a5aebdcd437fb3e47b334068d41 SHA-256: c26b1a4ba58debe95b52d74014837811e23aea7faa7952f4b7ebd8af385c1182
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware delivery. The document body, though heavily obfuscated, contains the same URL found in the heuristic firing. The presence of multiple embedded PDF links suggests a link farm, likely intended to obscure the final malicious destination. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.club/wix?keyword=mutualism+and+anarcho-capitalism In PDF document text
    • http://xofus.classringquartet.com/uploads/1/3/1/4/131406289/faradutafix.pdfIn PDF document text
    • http://files.nicolajanephotography.com/uploads/1/3/1/3/131379999/2f75f4496c71300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://649e2846-66cf-45aa-a6fd-7e74be58349f.filesusr.com/ugd/3c2e2e_8562d5c23f614f6896ef24fe5659b628.pdf?index=trueIn PDF document text
    • https://bdfb8398-bd04-4a3e-a4b2-8180adaa7a55.filesusr.com/ugd/805d2a_f78338d634a64fd3883ff9397cb5badd.pdf?index=trueIn PDF document text
    • https://d7ed3d19-835d-4ae3-abc6-9bbc52ee75e3.filesusr.com/ugd/762c1a_e41132b4823e4c63b20e22f6c9258a59.pdf?index=trueIn PDF document text
    • https://bbe59864-508b-4a72-bf1b-9000590d5f41.filesusr.com/ugd/ebc5f9_d71f6ba07d3449e6bf56c3e62a1988d6.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/ligifozada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/xewojarodasoba.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 5116 bytes
SHA-256: 6788964526b15518f054baee9ba3f1d744e5f485f13965aba04eb3b3f171a8e1
font_01_sfnt_off00012dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAC 15276 bytes
SHA-256: c871182fa2cc284156b366f65398f141d7a9fc6310faf347d5ad7e79190a7c9b
font_02_sfnt_off00015d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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