Malicious PDF — malware analysis report

Static analysis result for SHA-256 445dd3280a921c81…

MALICIOUS

PDF

71.8 KB Created: 2020-12-30 23:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: a0477bd0b021876e697c28b3ebb39f42 SHA-1: 835968658b1776d93b2762d1c26401e411d2c70a SHA-256: 445dd3280a921c816c8b361f85c4314585e9f5570b5f69110e37a500be8258bc
254 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a phishing lure or a downloader. The embedded links, such as 'https://ggtraff.ru/wb?keyword=piano%20master%20classes%202019', point to redirector infrastructure commonly used to distribute malicious content. The presence of numerous PDF links suggests an attempt to create a link farm or distribute further malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/wb?keyword=piano%20master%20classes%202019 In PDF document text
    • https://cdn.sqhk.co/pezolaje/f8ljehh/65371499130.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/dcb7991799.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/ruvaxomaket.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/hPZjjha/galaxy_space_invaders_game.pdfIn PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/renawudak.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/soviwazi.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/RDNZ3X1/big_bang_theory_characters_ranked.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/331981e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5fdbfa84c8903.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/nalifij/ganogatiwoxipenitufin.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/98137082138.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/genesexotapufavarujaleb.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/kalaikathir_tamil_news_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/free_handwriting_practice_sheets_for_2nd_grade.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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 5428 bytes
SHA-256: dcf2c10e01df688548a30a9e9254b75a05b6fafbb755254777ebc6964e07b95e
font_01_sfnt_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 10728 bytes
SHA-256: 3723d01946a90ad592895896e2d86aa1ca765b7488e7c87a7c9b369e68d5c802

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