Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d6a6170cf8d33c…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 15:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b269eb309244015937d3647b64ffe84c SHA-1: 279222af66313e7e0ff37ce9665bddeb28893824 SHA-256: 12d6a6170cf8d33cbc4f20f0c1547e81385e1c85ddb88ae4ef1fffed90e67665
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with SEO link farming and phishing lures. The document body, though heavily obfuscated, suggests a lure related to 'philosophy pdf'. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of malicious redirector links.

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.cc/wb?keyword=definicion%20y%20caracteristicas%20de%20filosofia%20pdf In PDF document text
    • http://files.brennanthefounder.com/uploads/1/3/1/4/131409333/7144903.pdfIn PDF document text
    • http://files.myceia.org/uploads/1/3/1/4/131406841/f8210ba1c9.pdfIn PDF document text
    • http://files.parentsvote.org/uploads/1/3/0/9/130969183/58a214a3.pdfIn PDF document text
    • http://files.onegatewaycincinnati.com/uploads/1/3/1/1/131164239/nizelozukudaja_gogazuxojuzet_letevo_kajuvexere.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/1/0432/1991/0811/files/lusebozebegexuvoledasaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/95615755510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/66300578459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/kimowivumorafutanemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1631/3242/files/nepugexiluwoletewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/69675862580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/80275468265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/rubozebeketuninubevujiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/jizonedowireniramasimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/zaditenalolekup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/61903596167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/18852544513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.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
🗂 Part of campaign: strotherlab.ca 3 samples

Related samples 5

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Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000769b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 5036 bytes
SHA-256: 0fe3b708217fcaa94127392be766f8e16122961ebfffdcfe11286cce086e7e92
font_01_sfnt_off000087d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D2 10324 bytes
SHA-256: e587819859d705dc0c599ee6bf12f9ea75f064939e76ec5070b626473f518a3f

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