Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcdd3577f60b84d…

MALICIOUS

PDF

77.5 KB Created: 2021-01-22 11:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6088de47959eaeab01166715fce408b9 SHA-1: 464483826dc6ae545ee6f34ff60ae160e8524dcb SHA-256: bdcdd3577f60b84df95c2e1ecaf7294b8f012823411fab797186fbe78f06b6c7
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous embedded URLs, including one pointing to 'trafftec.ru', suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=ok+google+not+working+on+android+auto PDF link annotation
    • https://cdn.sqhk.co/pasojixaju/ijNscjh/emergency_dental_care_usa_arlington.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/47379111545.pdfIn PDF document text
    • https://site-1175524.mozfiles.com/files/1175524/burma_cubensis_trip_report.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/hiagdjg/sky_force_commander.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/Q1Oghhd/dudolifivuz.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/dgi5BTs/furniture_for_sale_by_owner_websites.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/ekcheb8/3405594605.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/njfjjIT/dining_table_legs_lowes.pdfIn PDF document text
    • https://site-1210550.mozfiles.com/files/1210550/tegofebi.pdfIn PDF document text
    • http://dunizajo.66ghz.com/autoresponder_for_wa_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/hfVgcNd/56493129810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunijakokusageg.epizy.com/16263964528.pdfIn PDF document text
    • http://komoxam.rf.gd/microsoft_word_recipe_cookbook_template.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/gerukowunipebad.pdfIn PDF document text
    • http://jedajokojar.epizy.com/wibifapapubar.pdfIn PDF document text
    • http://fudewalazakukug.epizy.com/ibm_aix_ssh.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/big_sean_control_audiomack.pdfIn PDF document text
    • http://gixopesibesuges.epizy.com/masosunatenegogagagi.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_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 4996 bytes
SHA-256: 3fe8ddde74d6f586d7b672bc9554772de3db71ee7f88e29e3c0d51e3aa72b475
font_01_sfnt_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 10204 bytes
SHA-256: ada49b786054ff28bc45345f63b95107485b48603ec19b1f74a9d2f9bf5adc3c
font_02_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 16396 bytes
SHA-256: b59fbf4de48dd8aa3d96adf847c97080a63991bb53c972061d95bb3759270fd7

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