Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba2a8ea9bc62bfc…

MALICIOUS

PDF

115.5 KB Created: 2020-08-09 23:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43a28e84420f5509e2bba1b07cb6ba37 SHA-1: c6d97dea0dcb4b3bb266d937ec1d94f582c6b284 SHA-256: 8ba2a8ea9bc62bfc7f8fa11e34bc278e894dd18bc34fc591f25133ef518e6bd0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=neural+networks+and+deep+learning+basics+pdf', is presented as a link to a PDF about neural networks, likely to trick users into clicking. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO spamming technique. The document body is heavily obfuscated but contains the malicious URL.

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=neural+networks+and+deep+learning+basics+pdf In PDF document text
    • http://files.jimdarow.com/uploads/1/3/1/8/131856655/wivegaradifugagub.pdfIn PDF document text
    • http://files.gocmovies.com/uploads/1/3/0/8/130813827/xovarusep.pdfIn PDF document text
    • http://files.winstondavenport.com/uploads/1/3/1/4/131437722/janiweref.pdfIn PDF document text
    • http://files.tallywood.com/uploads/1/3/0/7/130738673/8682229.pdfIn PDF document text
    • http://files.thewhoresofyore.com/uploads/1/3/0/7/130738512/zetevow.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/1/0432/0657/4240/files/sogipadetedop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/fenubaxalilowojusezon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6750/5824/files/medical_billing_and_coding_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/pathfinder_ultimate_intrigue_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/kips_9th_class_chemistry_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/muwefaluvojiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/wixax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/forofogijatigota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/32362586958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/ameloblastic_fibroma.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_off000188e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188E2 5588 bytes
SHA-256: 61e2b450ad95ef5386d7c11064b8c90f25c35434ee63b0a1debee1eefec4190a
font_01_sfnt_off00019c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C09 10700 bytes
SHA-256: 80e82103a3282a89cab4b5d3f0fd29e59ed6e0b9b1e974d4e981370af8268025

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