Malicious PDF — malware analysis report

Static analysis result for SHA-256 796a114da0f0cc5f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 20:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40903e9644c2f1d41f92e6ae8547e0ba SHA-1: 5bd41a251c795a1e670c0ac219d37a3fc33b8ae8 SHA-256: 796a114da0f0cc5ffe6acd4016bab592a82b9e48ffe10fd5420b286dc2c07abc
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as free downloads, but they redirect to a malicious URL (https://ttraff.ru/pify?keyword=categorias+gramaticales+pdf). This indicates a phishing or scam attempt. The ML classifier strongly supports the malicious verdict, and the presence of embedded URLs confirms the redirection behavior.

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=categorias+gramaticales+pdf In PDF document text
    • http://bewovexot.gothicwx.org/uploads/1/3/0/8/130814297/kirepitoxiwikuzepa.pdfIn PDF document text
    • http://files.the-authorscorner.net/uploads/1/3/1/0/131070912/bonuripofi.pdfIn PDF document text
    • http://files.cfandtg.com/uploads/1/3/1/4/131453657/52e2228.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/1/0434/3581/9173/files/43107990233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/39821407739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/76455867455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/bis_711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/kilubegolapudataw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/farusabibovibumadosarobex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/schneider_electric_contactor_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/dekogobapapegisepoja.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_off00006887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 5380 bytes
SHA-256: 2842edf945b007865d3f5cf2daa042ebd7556db71eb8b7c058b2633ca583b796
font_01_sfnt_off00007abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABD 11904 bytes
SHA-256: 426da7eacc2c92463c1667718978970182927ab3448949936a4cde16dcaea71f

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