Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f99a5b39e09daa2…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 04:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e361dc505485c1023a9d88547c98a708 SHA-1: 81d40ebb2fe680ea94e806d5126617dd6ff4b177 SHA-256: 8f99a5b39e09daa289f79e5923895bd99b9928ceddc76b34a302ee6e9cfc9b11
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring users to a malicious site via a deceptive document.

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=physical+education+lesson+plan+template+alberta In PDF document text
    • http://fafakeset.mirandatinaphotography.com/uploads/1/3/1/3/131383664/2116d.pdfIn PDF document text
    • http://files.lafayetteschoolrestoration.com/uploads/1/3/1/3/131398357/nutuva.pdfIn PDF document text
    • http://batana.trnsetters.com/uploads/1/3/0/9/130969360/6945088.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/1/0428/5097/5910/files/39000819002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/balancing_redox_reactions_practice_problems_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2254/1219/files/28259736106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/81475655899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/40169356985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/locum_pharmacist_invoice_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/94974125418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/deutz_allis_9190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.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 8

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_off00005823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5556 bytes
SHA-256: 84db01cf9fa0b5872c632bed0f102920f21c959d4c665b382976a2d80c65b280
font_01_sfnt_off00006abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 10428 bytes
SHA-256: 6880d4294cd38407989532efc56b052579ec5298cffb1246fe6866522435bfa5

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