Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d85f3e7ead5337c…

MALICIOUS

PDF

38.4 KB Created: 2020-11-09 16:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 930b76f524cea0627440083bdcf4be33 SHA-1: 18921fcb85279585c3203a30cdd340786230a5e4 SHA-256: 3d85f3e7ead5337c4492ef2d2dc4918af91ef84a645fe73134771f59898087c7
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for malicious purposes. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of threat. No scripts were extracted, but the presence of the external URI and the ML detection suggest an attempt to redirect the user to a malicious site, possibly as part of a phishing or malware distribution scheme.

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://traffine.ru/strik?keyword=delta+shopmaster+bandsaw+blades+905726 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8fdc5a9c6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f990947b490c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f875d86aa3eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f9547320e3fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/bafivewemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a495ee-72fc-44da-aff9-d45eca563ccc/36829617506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e9ee10-98b6-4f03-abbd-2cf68f01a219/xuwukusipusinev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f67eeda-d818-4eca-afb6-d3a7e3e2d13d/new_leaf_cafe_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/nenepujap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bc7ce5-47ea-4ce9-b574-6019990e709b/44495506474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5a1c5f-8023-4f07-96b3-b8e4bd6cada4/unfinished_square_wood_table_tops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e070719-b410-4ffe-95d9-6745b7939a97/tebibuvinapazi.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/smith_and_wesson_model_60_serial_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91438620-b7de-4cb4-a073-ab7e038317cb/spirit_el_corcel_indomable_descargar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49EC 5956 bytes
SHA-256: 6b6b4ca21f922c411624c394e486f9b28b4f49100d5eb026eca6ad1104b254c5
font_01_sfnt_off00005e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 9472 bytes
SHA-256: c0772124c8143473b413228a5c86c8e272f55d1ef4de539e5cca4b0a67c8a216
font_02_sfnt_off00007e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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