Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1e92832ea6445e…

MALICIOUS

PDF

68.0 KB Created: 2020-11-18 02:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cf24d0a14d5bc4d0985182464907648f SHA-1: 21f9885c4792d3dfd9766698e108d1470da738d4 SHA-256: fd1e92832ea6445ecf4e39fe5bc9984f714a41e9a4ea59f92293d47417ef26f8
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The document body, though heavily obfuscated, includes text related to email flagging, suggesting a phishing pretext. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/123?utm_term=what+does+flagging+your+email+mean In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5f9791ab9c8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f8cea4182754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f8c57d7ec2d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f95ef0f2c7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5fb465172c47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_5fa4557437c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f8a0b3f6a489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/941e4338-5ae1-4b07-9048-f11c9c4c6f68/el_acoso_alejo_carpentier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afedb70-4431-4171-a388-ac0264bdd300/prince_and_the_pauper_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd87a48-c6c0-42e3-b6cc-a01322387498/49501802471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c221b8e-b058-41a9-a9a0-ccf1fdd85376/kazazadari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d2c76b-1c19-4758-9c88-7454ede8ee74/tank_trouble_3_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fea2d49-8665-4bce-b795-40c038b0320f/ncaa_football_14_xbox_360_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB37 5436 bytes
SHA-256: d2dea476a6e391d1a97857ff2f8691f2768d95b2bd88afd28144728561f5c294
font_01_sfnt_off0000dd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 11180 bytes
SHA-256: f70e6229f97dc9fad2da3039efae634d8a2fbbbf7fd3a69a348e699c76a01a79

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