Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7a35580846c844…

MALICIOUS

PDF

60.3 KB Created: 2020-11-13 01:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: dc892b73dc3d02c2bc30aee888da8cfc SHA-1: 859e8070b826bc9c92b98d636bc0a9f97a721be1 SHA-256: cd7a35580846c844ba525644f8b1ea0ee961a35249d3da9eab9c3adf31ffe0f5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?utm_term=developmental+biology+gilbert+12th+edition+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/arduino_lcd_keypad_shield_schematic.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/jovodufowaxewof.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/sapijis.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/amsco_ap_world_history_modern_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/romeo_and_juliet_act_2_scene_1_study_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/sample_balance_sheet_of_sole_proprietorship_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/2735503324.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/congruent_transformations_worksheet.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_off0000ae57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE57 5764 bytes
SHA-256: 9ea85bf4de89a1b327bfa557704c6816e6930aca5b7df2d776188a20a990965f
font_01_sfnt_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 10292 bytes
SHA-256: 647a95f76fd59f89ceba7d8680e0cd0c37446659515fbd6d6bce808d5be0b797