Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9c7eff41a1545e…

MALICIOUS

PDF

94.8 KB Created: 2020-11-20 08:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2351ed3157a0604b598f2335ed39cb84 SHA-1: 56ad4f224a996c415b8e6dd61585877447b6ab70 SHA-256: 8d9c7eff41a1545ed38a64bfe0d22aa39de8d053036c9b03c9f2c7e631a9bd37
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical ClamAV detection for Pdf.Phishing.Trojan. The primary lure URL, 'https://ggtraff.ru/123?utm_term=kenwood+ddx370+manual', suggests a phishing attempt disguised as a manual download. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate malicious intent, likely to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=kenwood+ddx370+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_5fa4bc7ef2c01.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/andrew_chang_running_for_president.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5f9559e7d28f7.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/rilaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_5fad3b3ed2b95.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/religowurun.pdfIn PDF document text
    • https://lotetirupaxep.weebly.com/uploads/1/3/4/0/134013035/nowivodefivut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480889/normal_5fa9936224e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f961cf357922.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 5212 bytes
SHA-256: 15ab09adf7af208334f9a7fb42bd89bce125dc3e0fe62c0f8d8c769bd8e079a0
font_01_sfnt_off000126e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E9 15900 bytes
SHA-256: dbbfd3764b76815fb72702bc903760b094c5d9e28ce10ff69522d8fed3639556
font_02_sfnt_off00015993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15993 16248 bytes
SHA-256: fbeccb1482ee56052ed809ec6cb7dfbc577d51b9212e43fffabc93e29761b6bf

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