Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc100873e8c3bd9a…

MALICIOUS

PDF

69.1 KB Created: 2020-11-25 00:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02266aa5f746e5754f78f60882abdeb8 SHA-1: 9b048f3f1a5f16f299fdb896e4ace61dcf26295a SHA-256: fc100873e8c3bd9ab2a5b26e9d293788e75cc2031c5df1c3c147654a82860a77
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as https://cctraff.ru/aws?utm_term=riverdale+carrie+the+musical+album, are designed to lead users to potentially harmful sites. The presence of a large number of external PDF links further suggests a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=riverdale+carrie+the+musical+album
    • https://kotugupevexaxis.weebly.com/uploads/1/3/4/4/134493549/vawebojozolofimigusu.pdf
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fab5fc211c64.pdf
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5fa42b8d96ba6.pdf
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/jebegejotituluf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vovabagubajegeb/chi_squared_bozeman_science.pdf
    • https://uploads.strikinglycdn.com/files/07040ad8-b9f3-401a-baad-6039fc5face3/rumigizupugu.pdf
    • https://uploads.strikinglycdn.com/files/d51e51b1-3472-4c40-a581-6b5cf4a50829/mogosugezu.pdf
    • https://s3.amazonaws.com/vipinib/burnout_3_takedown_ps2_game_free.pdf
    • https://s3.amazonaws.com/timeziso/53990443354.pdf
    • https://uploads.strikinglycdn.com/files/9942b2ec-c341-471f-972e-5c67d5c2c577/sofidavasurem.pdf
    • https://uploads.strikinglycdn.com/files/ba1482ac-068b-495b-ac60-c615bac6e329/zemusuko.pdf
    • https://uploads.strikinglycdn.com/files/fe46d3b4-890f-4c22-9abf-b2aef05ffef0/88733403796.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c53f.bin
60ceabd27edd5e2a983285c5f3b2b9febb63cf9ef441218893c2abddf1f25315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC53F 5052 bytes
font_01_sfnt_off0000d668.bin
7acd0dabdafbf6268364c47b487edde65aba2312d1ad5b3a6c3482316a55666f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 10300 bytes
font_02_sfnt_off0000f99f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 4324 bytes

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