Malicious PDF — malware analysis report

Static analysis result for SHA-256 9979f52340c31f63…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 17:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa4755e649c8f327f4864cb68509057a SHA-1: 8b48779ff73d1bd4b695e69752ee81a074d605cc SHA-256: 9979f52340c31f63f07f4d4662445df27ca36b29a330ccb9613310a317e774c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to a link farm designed to host SEO-optimized PDF files. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'free download' and a URL that matches the malicious redirector. This suggests the primary goal is to trick users into clicking the malicious link, likely leading to further malware delivery or phishing.

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=because+of+miss+bridgerton+pdf+free+download In PDF document text
    • http://files.ecstantonhometown.org/uploads/1/3/1/6/131606268/malufi.pdfIn PDF document text
    • http://files.mnquidditch.com/uploads/1/3/1/8/131871864/nikajurudulazo-zoxuwivelamug-sejunebuxixe-juvifinev.pdfIn PDF document text
    • http://files.joeantico.com/uploads/1/3/2/3/132303351/62187fc733f7e3.pdfIn PDF document text
    • http://files.yogapeutics.com/uploads/1/3/1/6/131606407/xalenij.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/1/0429/8519/3621/files/calculus_early_transcendentals_11th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/law_on_obligations_and_contracts_hector_de_leon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/negezepagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2076/2783/files/tepulexalajiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/wasetavewageniromujaxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/54736417539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/rurexusefepej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/5886067889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/50148259195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.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_off0000673c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673C 5756 bytes
SHA-256: aa252751325e03db5ba8a397247be25956f0fbc03d4384b56d920f42569a85d9
font_01_sfnt_off00007abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 10596 bytes
SHA-256: 5d2d19928469b7b6fbfb59224132447dfa9b0fe57a04a84f6a0e24bcfcbd57d7

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