Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ac24f7f9cca252…

MALICIOUS

PDF

55.8 KB Created: 2020-08-14 08:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5c70de378da659b7b4c7a3fc599b332 SHA-1: 7637202ff570efdcabc3ddf7238fcbc2b3ca47c4 SHA-256: f6ac24f7f9cca2524e2732668d16ba70feab407bacc340d09422d55e11dab2f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=termination+letter+template+uk', suggesting a lure related to employment termination. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including a known malicious redirector, supports this assessment. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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=termination+letter+template+uk In PDF document text
    • http://wavobumow.lori.com.au/uploads/1/3/1/3/131384709/9966436.pdfIn PDF document text
    • http://vexedoreb.sirwaffle.com/uploads/1/3/0/7/130775126/5003919.pdfIn PDF document text
    • http://bazutul.clarawellsart.com/uploads/1/3/1/6/131636725/811332.pdfIn PDF document text
    • http://files.thehill.services/uploads/1/3/0/7/130739892/lovirara_narikefowa_vuxakazoler.pdfIn PDF document text
    • http://ninokef.sunshinejeremiahwolfe.com/uploads/1/3/0/8/130873965/venorar.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/1/0434/2431/7607/files/22063500450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/83658532795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/nutigevupufamezufowukuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/xalil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/the_black_temple_entrance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/sefagusaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/jixapebuxegot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/xojebumexesenuvawutimav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/94186065639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2618/4352/files/marriage_certificate_form_gujarati_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/junejetakabapigagalekipo.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_off00009d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 4800 bytes
SHA-256: fb8132f892271d83bb83c2ad54e6124a86b39971619bce34467ba323dfac8a31
font_01_sfnt_off0000ad7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7E 10696 bytes
SHA-256: 044411b11b6d2014805242bafb46488fec904f0714219062029cca11c5ffae9e

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