Malicious PDF — malware analysis report

Static analysis result for SHA-256 731088663bf361cb…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 03:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00fa7ecb5ad925f4b826516d2eee4f0e SHA-1: a1f4d8c5bd34e532b383fe3e810d40d8a76b7f32 SHA-256: 731088663bf361cb2cd2be5bb65f60f6131d47e1031015aa52ba1c935e4cbd04
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.ru) that is flagged as malicious. The document body, though partially corrupted, also contains this redirector URL and several benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic to lure victims. The ML classifier strongly indicates maliciousness.

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/wb?keyword=reutilizaci%C3%B3n%20de%20aguas%20residuales%20pdf In PDF document text
    • http://files.mmhsphoto.com/uploads/1/3/0/7/130739651/909d0f.pdfIn PDF document text
    • http://files.eguastella.com/uploads/1/3/0/9/130969546/4582363.pdfIn PDF document text
    • http://files.americansemi.com/uploads/1/3/1/8/131855992/jaranaxoragajovux.pdfIn PDF document text
    • http://doxevu.jlsmither.com/uploads/1/3/1/1/131164312/8933318.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/1/0439/5663/3758/files/modern_physics_6th_edition_tipler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/festo_pneumatic_valves_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/15969527428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/basic_of_programming_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/cancer_types_and_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/malogelepowuralefepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/wixogujemupis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/pale_rider_persona_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/espn_college_hockey_scores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/polymeric_biomaterials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/15228479865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/texas_drivers_license_renewal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/48559257815.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 4

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_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 5516 bytes
SHA-256: 563b2a6c88f7546b5a6c8e9cd511b771af10dba7cfb4e74dda05b14f9b084d12
font_01_sfnt_off00007567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 10468 bytes
SHA-256: db43532184c369f104b695ebacf03c3d5e3033aafed5c0faaab0c93e58643ead

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