Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3fbb44c962e2d7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 00:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd4da71f023593a33b58cb20138fdfd4 SHA-1: 3d191d1361ede6655a365444d13bbf54cb029401 SHA-256: 9f3fbb44c962e2d759f64f05cb8c33141dab93252834cd4fabc1007e8dd7ce80
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious File:Malicious Link

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search results or distribute malicious content. The ML classifier also flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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/pify?keyword=address+resolution+protocol+tutorial+pdf In PDF document text
    • http://nogekorof.1am.ency-education.com/uploads/1/3/0/9/130969742/308442.pdfIn PDF document text
    • http://pusisi.swampfest.ca/uploads/1/3/0/8/130813528/f522b47.pdfIn PDF document text
    • http://tometu.fcstnebraska.com/uploads/1/3/1/1/131164250/904894.pdfIn PDF document text
    • http://files.lovettpianoworks.com/uploads/1/3/1/3/131381109/3756781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/suikoden_2_recruitment_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/adele_rolling_in_the_deep_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/97213046198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/nepiwozaferejuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9373/6089/files/kelunivozeloxubafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/chemistry_notes_for_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/binary_multiplication_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/9984475849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1635/4978/files/2017_calendar_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/wotifib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/67721886991.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 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6911 5140 bytes
SHA-256: 97675a3e1b05674a57cf986a0859f5fdb76db08e91fa8b09446f3156a7b0996c
font_01_sfnt_off00007a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 10816 bytes
SHA-256: 05ed22b585a64a9e70fed26096f0336464915a40955a276e4941b1ea9ced7c52

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