Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfb8409cc1ce921…

MALICIOUS

PDF

38.4 KB Created: 2020-11-07 06:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b355715f1ac93a78db0b1f696ffa594b SHA-1: 75dd877df90c5e7a5be65be12b75f51d7bddeacb SHA-256: 2cfb8409cc1ce921e14ef0d0ba4f9dcb920a43513f34d8835b5f52b79f22fc52
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 points to a suspicious domain, identified by the PDF_URI heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially obfuscated, contains the URL and text related to 'Oem chevy z71 decals', suggesting a lure to trick users into visiting the malicious site.

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/123?keyword=oem+chevy+z71+decals In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f93aee6b79a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8b5346b0981.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/8e1c88a9-4578-4222-b65b-de4f426df68a/8_ball_pool_unblocked_games_google_s.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/criterios_para_cetoacidosis_diabetica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1228cb-3622-42e3-89f7-e55860fdb20b/36179505987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa37ffe-a197-48d2-83c1-b4927b84a732/duo_therm_model_600315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f957a04-40c0-4f7e-bd67-bd1e056bb091/dell_9020_sff_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f4a9e1-a966-48bc-91b4-a66e2d6c4412/32916285013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19569ce-cb32-41c6-9131-c66a0631d2cd/youngs_modulus_of_wood.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/48718967538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6787de2-1e91-4d3e-9a6a-eedb9a6c8ff5/jio_tv_apk_5.6.0_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eef8bcc-a21d-4028-b7ec-d172f426798c/15707777579.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_off000053fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FE 5456 bytes
SHA-256: 47c269010b57af6061e21d7e3cb2596b8e389ac10dd9f43dd1e1f78ad89ccec4
font_01_sfnt_off00006684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 11344 bytes
SHA-256: a827a587c49f095400028077c5fcf0b1f106777c53869a138c5d7a176af6a435

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