Malicious PDF — malware analysis report

Static analysis result for SHA-256 73451e5dcda0d4c8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-28 12:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fb5e68d43371e879f7166fbd45b040f SHA-1: d83ed84f2330b2fe104fd223339ec772a75c1720 SHA-256: 73451e5dcda0d4c81432dbba6ce38ac99b41ce0de6a1598ccbd8ec87a0764af8
202 Risk Score

Malware Insights

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

This PDF document contains multiple links to a redirector service, which is a common tactic for phishing and malware distribution. The presence of a 'download button' lure and a large number of external PDF links suggests an attempt to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, supporting the observed redirection and link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=94fbr+fl+studio+12 In PDF document text
    • http://files.pavlicek-foto.com/uploads/1/3/0/9/130969565/sirejifora.pdfIn PDF document text
    • http://katumep.dwarvenworkshop.net/uploads/1/3/1/6/131606782/ff9947d1.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/1/0433/4957/3784/files/embryonic_hematopoiesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/60009246022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/powetorezezasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/alquimista_libro_completo_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/nemijuboxeluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1331/5480/files/xavirogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/crafting_guide_f2p_rs3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/34803322104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/63662488387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9568/7317/files/88278986696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/81219738285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/bixabukunuxalimatupito.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 3

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_off0000612b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 5164 bytes
SHA-256: c2a851d44e228ac636a3a0382e0b9d10f78700ea739e39db8075f8712e7620f8
font_01_sfnt_off000072c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 10052 bytes
SHA-256: a1ad4dd146fbbc8dc85aeb347be661378d90de44230b309972a63ceb839d4457

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