Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d766c77b2ff658f…

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 06:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 58f4d48a66e099f859aca0d10f829ebc SHA-1: 8fe3dd17b40ddfb66c3044b0677cbd479120bbf6 SHA-256: 0d766c77b2ff658fe5d6041b37180b9a5045998f6832b932a47dcd146e418205
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, masquerading as a worksheet. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document is part of a link farm designed to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.cc/wix?keyword=finding+probability+worksheet In 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://cdn.shopify.com/s/files/1/0431/1370/9722/files/12965342809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/69861772009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/kawubaxekogorolazubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/sociology_as_a_science_of_society.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/wirigasilotapelabofax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/dofaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/idol_champ_quiz_answers_may_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/phonics_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/gopugezozikagiraxesapew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/alternate_exterior_interior_angles_worksheet.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_32d97ab57f0a47c9ab6851cf43d13cac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB5 5364 bytes
SHA-256: 1204745c80efd76cce40b8809136815cb7995ffda6cf6d3ef845106b43894625
font_01_sfnt_off00006df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 10136 bytes
SHA-256: f31381d0aa91863c5ece879266bbd62b6f0bbd665d82d4695416b7b98d6462dd
font_02_sfnt_off000090b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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