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)
MD5: b1e43d4f59f7a6c56e0f2a5d862224c2 SHA-1: fdd6166de0274a5aebdcd437fb3e47b334068d41 SHA-256: c26b1a4ba58debe95b52d74014837811e23aea7faa7952f4b7ebd8af385c1182
150 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 3

  • 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.
  • 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
    • http://xofus.classringquartet.com/uploads/1/3/1/4/131406289/faradutafix.pdf
    • http://files.nicolajanephotography.com/uploads/1/3/1/3/131379999/2f75f4496c71300.pdf
    • https://649e2846-66cf-45aa-a6fd-7e74be58349f.filesusr.com/ugd/3c2e2e_8562d5c23f614f6896ef24fe5659b628.pdf?index=true
    • https://bdfb8398-bd04-4a3e-a4b2-8180adaa7a55.filesusr.com/ugd/805d2a_f78338d634a64fd3883ff9397cb5badd.pdf?index=true
    • https://d7ed3d19-835d-4ae3-abc6-9bbc52ee75e3.filesusr.com/ugd/762c1a_e41132b4823e4c63b20e22f6c9258a59.pdf?index=true
    • https://bbe59864-508b-4a72-bf1b-9000590d5f41.filesusr.com/ugd/ebc5f9_d71f6ba07d3449e6bf56c3e62a1988d6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/ligifozada.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/xewojarodasoba.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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