Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6b4e765b4b2300…

MALICIOUS

PDF

65.9 KB Created: 2020-11-24 02:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5953c0a5f0f974feee11eaa50f1ac717 SHA-1: d3d8bb86ebe7227defe32b36dc64d42874640fac SHA-256: dd6b4e765b4b2300caca38ae3183fac67830ed09a31d4cbdcd2aca1b43e4e190
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=lol+apk+indir'. This indicates the document's primary purpose is to lure users to a potentially harmful external resource. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=lol+apk+indir In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f9747953dce7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/dadidane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c995c9-56ab-445e-b538-7851ae238f16/54387622401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95ce16e-3a7a-4a80-b20b-068515559eb5/16975390093.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/deduputixepebabeledeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ac5a7c-8d98-4188-b425-eeb60b50eb1d/52931889648.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/64100560969.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/50711248142.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/panawiwox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906468a4-c844-4b30-8874-6a0146c617eb/firefly_rpg_skills_list.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/58073540145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d4d5f7-4db7-4992-97c3-b3aa07dda346/88972354703.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF13 4780 bytes
SHA-256: 82db76e7c82b8bf26fab4d8856be1998598eb7908451b62101f063977e546b39
font_01_sfnt_off0000bf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF62 11032 bytes
SHA-256: 44a72bdf5e1fe66d0b0d6b11b3ae0a821ce09f4b8d2fefe6af6cad1d11a2d589
font_02_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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