Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c249e544bf678e0…

MALICIOUS

PDF

32.5 KB Created: 2020-08-05 02:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9203b3f2f4680f9dd4e69706e1b956e SHA-1: 436e632ced607f6cba38b385e51f0a9ec7024478 SHA-256: 5c249e544bf678e0f07919d01fb51fab942947255c4d52ea60e3b7975157803e
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.com) that appears to be part of an SEO link farm. This suggests a phishing or malware distribution scheme disguised as a free download service. The ML classifier strongly indicates maliciousness, and the presence of redirector links further supports this.

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=textbook+of+diagnostic+microbiology+pdf+free In PDF document text
    • http://files.joepeatfield.com/uploads/1/3/0/7/130775368/4621944.pdfIn PDF document text
    • http://files.atlanticchallengeusa.com/uploads/1/3/1/4/131407364/kololumivomugajuvelu.pdfIn PDF document text
    • http://vowuxup.viholisticnutrition.net/uploads/1/3/1/4/131482976/mapofosumom_didulutinafojet.pdfIn PDF document text
    • http://files.schreinerarbeitenbuechler.com/uploads/1/3/0/7/130775084/bikozaz.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/1/0440/6883/1382/files/condiciones_para_el_aprendizaje_significativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/9495547462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/dofijovenigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/tesis_sobre_auditoria_interna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/17598982653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/vijay_tv_serial_tubetamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/41981973164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/dubukeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/nedibigewowemugilizunidop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/soguzujukijasugokojuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/31077343133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/67768810610.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_off00004433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4433 5800 bytes
SHA-256: 454b228dfbc555361687639e8cc37c54c08c4d11399fb3ab7ad62c048c2d617d
font_01_sfnt_off000057f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F0 8472 bytes
SHA-256: 43034ffeb8446af6448bf92e3d7b92251995c8227898579a6b080831fdf71b18

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