Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3db816c187b72c…

MALICIOUS

PDF

49.5 KB Created: 2020-11-03 23:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 854cc89285990d6b397436bb16fdf78c SHA-1: 3277aa51df5c0728c9ea6b2466b3065449925700 SHA-256: 4e3db816c187b72c5898b4f5161aa9458d157ad96881fb8c8bb85e19cf144266
134 Risk Score

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://gettraff.ru/strik?keyword=chemistry+connections+to+our+changing+world In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f8ece747fcb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5fa1838c3a1b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9313fb19421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f93455ad7bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f97bbfa271fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f99f37c0078d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8e94caa1656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f932bd15d094.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/leguvefu/65319375256.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/compound_probability_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/kindle_fire_hd_8_7th_generation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6106afdc-3054-4d79-8ff2-7e309cd97408/60946165332.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_off0000712f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 5452 bytes
SHA-256: 464c178cdf08403a6c776e835d239f0e30e9831892bc02c27fc5e793e95c4351
font_01_sfnt_off0000839f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839F 11680 bytes
SHA-256: 92fb8fec6038a748f1b51f519d99a56883ea98e0978ae7cf0b8a34e5271ba207
font_02_sfnt_off0000aa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA7E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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