Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3d65787823946d…

MALICIOUS

PDF

74.6 KB Created: 2020-12-26 06:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5b58b0469a3f69bf492a9e7012052713 SHA-1: cd20b4acde4d64167eda59d080b56831aa7a9344 SHA-256: bc3d65787823946d3ee86dc72caf3c06ecc6ef95f1575b573f290f7d5b17c477
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a malicious redirector, specifically designed to lure users via SEO-optimized links. The primary link identified, 'https://ggtraff.ru/123?utm_term=chemistry+of+carbohydrates+lab+answers', is flagged as a known malicious redirector. This suggests the document's purpose is to lead the user to a harmful website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=chemistry+of+carbohydrates+lab+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd2420e7a2a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fdef1ebe162a.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/4PJgdWo/hd_mp3_music_player_online.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/NBjjH24/komuvinaluxuvipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fc229ec69dd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426557/normal_5fcc94df94ff7.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/a242e1e2-9ad9-4a1b-a40a-b40b09a6e56b/24577857395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660bebb9-338f-4c31-aef0-e271f1fc35f8/monster_catching_anime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78486fe-92ec-4592-b0a5-addd7639b45b/8720272206.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/android_update_google_play_services_without_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37484a16-5aa6-4f28-9fcc-ae3c887e3301/29570447089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fee4c1c-5f99-4d71-b60f-61e90e321d80/salisapesazuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c798f04-172f-45db-9d20-d94f2b37bca5/zamaveja.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5500 bytes
SHA-256: 9cf1ae88a1b5e63d539e408e20a3956ea87fb923ec1fb5dbc3955fb07eb64e5b
font_01_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 12488 bytes
SHA-256: 5828dc1de77d6e169eb29fed07d81185dbce7ebcc87cf5717a3aa2cc14d8f816

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