Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e891a525865884b…

MALICIOUS

PDF

36.3 KB Created: 2020-08-08 17:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c29082e44f5fad971b35f5495b85c9d SHA-1: bfbe8bd8933473e64becd0922f36e33cb0899490 SHA-256: 9e891a525865884bede261ba7264e6f8c5c8461c8589ab88dec6e82e4c37dd71
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to a link farm hosted on Shopify. The primary redirector URL, https://ttraff.ru/pify?keyword=entropy+optimization+and+mathematical+programming+pdf, is flagged as malicious. The document body itself is heavily obfuscated and appears to be a lure, likely to trick users into clicking the malicious links. The presence of numerous links and the redirection to known malicious infrastructure strongly suggests a phishing or scam campaign.

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=entropy+optimization+and+mathematical+programming+pdf In PDF document text
    • http://kijemu.rachelbeckles.com/uploads/1/3/0/8/130874359/vivaxufo-kesediteloko.pdfIn PDF document text
    • http://files.launchbusinessgroup.com/uploads/1/3/0/9/130969260/4063810.pdfIn PDF document text
    • http://files.redcientificaescolar.com/uploads/1/3/2/6/132682168/2f2e031e10bbc9a.pdfIn PDF document text
    • http://duronesep.yue-fei.com/uploads/1/3/0/9/130969426/rijusazuv.pdfIn PDF document text
    • http://files.aquaelementeliquid.com/uploads/1/3/1/3/131381900/9440371.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/1/0433/2906/1014/files/34672301811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/mogusukeniril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/geographical_information_system_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/43506940811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/31355713020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/heroku_static_site.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/sims_3_mansion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/lopetemazatem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/80179675600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/10663101389.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_off00004dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD8 5500 bytes
SHA-256: 603e802deb2918c9a14581dbc8c01d37e99371d7858a906ef5c0ba79757d84e7
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 10416 bytes
SHA-256: d2ac7995430a786022aeff2d6a842816ebba56933ca1a7a3b0b5304a4bcbbaa3

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