Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ccf40ba4d74632…

MALICIOUS

PDF

37.0 KB Created: 2020-08-03 09:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 843a2ccbed8bb20f0101978303647875 SHA-1: d5148ab6c6af6f933e65d1e3af6a7b5438fa1b57 SHA-256: 81ccf40ba4d7463225291f7d2dc1de7935b3fe52ca6596abb8d0c89aaf9e8346
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body also contains the same lure text and URLs, suggesting an attempt to trick users into downloading potentially harmful files. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for linking to malicious redirectors and for being part of a link farm.

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.com/pify?keyword=psychology+david+myers+9th+edition+pdf In PDF document text
    • http://files.integritydetailcookeville.com/uploads/1/3/1/6/131636941/5aaf03.pdfIn PDF document text
    • http://files.mariapalmerart.com/uploads/1/3/1/8/131856492/xemelexojirina-poworokopudota-losamutet-fonuluvodikaga.pdfIn PDF document text
    • http://vuvajim.blissfulballoons.co.uk/uploads/1/3/1/4/131452922/lifiraxedajobevoxiva.pdfIn PDF document text
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.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/1/0428/9835/8432/files/pizegavegip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46496449222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jivapomepuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/xavejasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/niteditigigomerisuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/66660446444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/sonanuluvenewofizuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/sitipisagejufagud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/zozetegunarilofut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/tobiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/18251785292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/8326563985.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 8

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_off00005053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 5888 bytes
SHA-256: 88538fb4e1e908512175dab9f0b90d36050c4c9b154a500519406818685a6722
font_01_sfnt_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 10336 bytes
SHA-256: 98fb49b836b75c855d4b4109010cb05fe82c29dd3a6935a0058e1f85ea8a014d

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