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)
MD5: b269eb309244015937d3647b64ffe84c SHA-1: 279222af66313e7e0ff37ce9665bddeb28893824 SHA-256: 12d6a6170cf8d33cbc4f20f0c1547e81385e1c85ddb88ae4ef1fffed90e67665
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, masquerading as PDF documents, which is indicative of a link farm or SEO spam campaign. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/wb?keyword=definicion%20y%20caracteristicas%20de%20filosofia%20pdf
    • http://files.brennanthefounder.com/uploads/1/3/1/4/131409333/7144903.pdf
    • http://files.myceia.org/uploads/1/3/1/4/131406841/f8210ba1c9.pdf
    • http://files.parentsvote.org/uploads/1/3/0/9/130969183/58a214a3.pdf
    • http://files.onegatewaycincinnati.com/uploads/1/3/1/1/131164239/nizelozukudaja_gogazuxojuzet_letevo_kajuvexere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/lusebozebegexuvoledasaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/95615755510.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/66300578459.pdf
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/kimowivumorafutanemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1631/3242/files/nepugexiluwoletewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/69675862580.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/80275468265.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/rubozebeketuninubevujiru.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/jizonedowireniramasimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/zaditenalolekup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/61903596167.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/18852544513.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.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_off0000769b.bin
0fe3b708217fcaa94127392be766f8e16122961ebfffdcfe11286cce086e7e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 5036 bytes
font_01_sfnt_off000087d2.bin
e587819859d705dc0c599ee6bf12f9ea75f064939e76ec5070b626473f518a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D2 10324 bytes

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