Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bf7c305522b1e4…

MALICIOUS

PDF

34.1 KB Created: 2020-08-12 22:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d21b14c8c2a86e115eca1f0fb375f199 SHA-1: b2499a67b040f367e6912d5846b6a4a5dee66abd SHA-256: 37bf7c305522b1e4654f663b06af2a248f835ef682f81c56574a4c52335e66c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one primary redirector URL, 'https://ttraff.ru/pify?keyword=benim+hocam+tyt+biyoloji+pdf', is flagged as malicious. This suggests a link farm or SEO manipulation tactic to lure victims with seemingly legitimate content, ultimately redirecting them to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=benim+hocam+tyt+biyoloji+pdf In PDF document text
    • http://ronag.mychemicalguys.com/uploads/1/3/1/3/131398455/lenedozegawuji.pdfIn PDF document text
    • http://files.terrencejon.com/uploads/1/3/0/8/130873708/9294522.pdfIn PDF document text
    • http://files.mobilemusicphilly.com/uploads/1/3/0/7/130775837/retikusuv_kafexil_gavamokupesura.pdfIn PDF document text
    • http://files.commonwealthmun.com/uploads/1/3/1/6/131636923/c26d43e097.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/1/0433/0258/4480/files/peredopugamiwudubotajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/98365835439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4437/9546/files/xijazibiginejemafurupel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/48639675728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/dudetefodani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/mivojadere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/93665729530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/91058411373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/14162286987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/mesogiramujugiziwedajisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/43207097094.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_off000044ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44EC 5488 bytes
SHA-256: 734dda6379b4a475ced79ae541eace6c5157e344dd4d3bc00255851ad0572db1
font_01_sfnt_off0000576f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576F 11280 bytes
SHA-256: dde405bfc8325f7a95955c4da04d8c697a0acfc6f478ef57d8bad62d5da42be7

Open this report in the interactive analyzer, or submit your own file for analysis.