Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e61ec23b887ecb…

MALICIOUS

PDF

43.9 KB Created: 2020-10-02 20:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: c2db9f2ae92db168675127e5644f6d4d SHA-1: 5ed793b050659ffe9b7d3a1a7784150e7bfc0c0b SHA-256: d3e61ec23b887ecbdc8cc698fda1b6b758014c0e95b43478a63bce3e64e0bdc4
194 Risk Score

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://cctraff.ru/strik?keyword=jazz+real+book+eb+pdf In PDF document text
    • https://site-1039156.mozfiles.com/files/1039156/vukikufobenuxotijib.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/nunapamodonebu.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/fevezigen.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/tizebijatezapupogozip.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/83902a10-45e5-47f5-b741-2c1fd7c1a47d/demavixof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b1a303-7bc2-407b-916a-8b3e68319992/nukizokilepika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a192cb6-3cbb-4d8a-b0b4-e65247dea894/vogilawumelin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c9d578-5e01-4813-b9a8-a53ecfa1ab74/70546308994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/nozzle_and_diffuser_difference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1844/7771/files/4924892276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9023/5558/files/show_that_matrix_multiplication_is_associative.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9614/5062/files/ios_9_beta_update_requested.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/persona_5_the_animation_episode_15_twitch.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_off00005f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F94 5100 bytes
SHA-256: 29d696b589a93f55e4667e78bf84ab4accedee970cc586e5c5456532c02eb192
font_01_sfnt_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 15620 bytes
SHA-256: 840d027ae19f61caaf0fe9b5be744ea4e1fa42517b55a0c70dcf551ce4259dc4

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