Malicious PDF — malware analysis report

Static analysis result for SHA-256 43060db5b40be2ab…

MALICIOUS

PDF

31.5 KB Created: 2020-11-06 21:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f089e61a88497b1f3bec598357c34091 SHA-1: d50f6e1415cd244765f8a7bab8f69f30436da918 SHA-256: 43060db5b40be2abfa8b5b2d31725bfa2c33275dfd981641f580ddf94cc7287f
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://traffking.ru/123?keyword=french+revolution+dbq'. This suggests the document is designed to trick users into visiting a malicious website, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffking.ru/123?keyword=french+revolution+dbq In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87f20356517.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/9886217.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xosobaku_wujunawik_tokeberu.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/30ee79a74f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f8a69f82375f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f8d9e50c8cdd.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/kekunawi/passive_transport_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d98087c-cd35-4385-80f4-eabe218fcb63/ar_blue_clean_112_pressure_washer_ma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82316caa-9320-4255-9df7-45c695fef5c6/piano_accompaniment_patterns_midi.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/thinking_pinoy_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0515f358-a239-443b-a869-52750ab156f2/tisebatabosaru.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_off00004389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4389 4920 bytes
SHA-256: c39ef9711f6b3d833a2b27dafcea4602e225ac5f1209c99a86bd1f92383dac6d
font_01_sfnt_off00005444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5444 8680 bytes
SHA-256: 3bc17433a25b1ed35a846290e772b52efccc0742772c0abcd99c877c4480f854

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