Malicious PDF — malware analysis report

Static analysis result for SHA-256 7309d89adf96df15…

MALICIOUS

PDF

50.9 KB Created: 2020-08-08 22:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c8b76817eded652bcccbda88ccb6487 SHA-1: e4e96fc1a1280dee8660a0c9f03efb78fd46c7ff SHA-256: 7309d89adf96df159f1251bc565ff9b442994edd940258636c6d1c12d77c31e3
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate downloads. The primary link, however, redirects through a malicious infrastructure at 'ttraff.ru' to a page related to 'statistical inference for stochastic processes pdf'. This suggests a phishing or SEO poisoning tactic to lure users to a malicious site. No scripts were extracted, but the PDF structure and embedded links indicate a malicious redirector pattern.

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=statistical+inference+for+stochastic+processes+pdf In PDF document text
    • http://files.literacyandbeyond.org/uploads/1/3/1/3/131398195/fofesozub_kinaxexede_kexugugozipam_bizelumaxo.pdfIn PDF document text
    • http://files.chamisachocolate.com/uploads/1/3/2/6/132695428/6052314.pdfIn PDF document text
    • http://lowero.ochrestudio.com/uploads/1/3/1/3/131398140/c86aa65e191b8.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/1/0428/4078/5062/files/download_agama_islam_kelas_12_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/nukaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/66706219209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/ranutexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/losage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/najuvanorumafina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/pefevevidomutuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/29157012874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/5384573835.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 5344 bytes
SHA-256: 459f8a8c702d3a71c5f96cc43420acd1c71e6fb6d148650cf3fd0b42c64894e9
font_01_sfnt_off00007c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 14132 bytes
SHA-256: a2ebf72a3a2b81059320315c0c18c5fb74055d03524a08b8bf75084970ccb321
font_02_sfnt_off0000a953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA953 16084 bytes
SHA-256: 192e1cf8743c95d644f41697cb32af4f2bd92b7888e96aef7f61385a8dcfe722

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