Malicious PDF — malware analysis report

Static analysis result for SHA-256 d218f839f409a80f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 19:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29d3676382d72369dbc24ace6c2b0821 SHA-1: 330ab8204510a2807c14d1716f16e61d6d6335bf SHA-256: d218f839f409a80f7aa7f704e4f1ad4308bf0c4b88e810db5ec97e8aac396e81
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link farm with multiple embedded URLs. One critical heuristic identified a PDF link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=descargar+libro+caballo+de+troya+4+pdf+gratis'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to this redirector. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=descargar+libro+caballo+de+troya+4+pdf+gratis In PDF document text
    • http://files.kevinkilroy.org/uploads/1/3/0/8/130814032/juderasepujapaz.pdfIn PDF document text
    • http://files.govmation.net/uploads/1/3/0/8/130814056/kaxir_sejuvipu_titokixozumip_pewovuleremu.pdfIn PDF document text
    • http://files.knightsautowash.com/uploads/1/3/0/7/130776386/8500239.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/1/0433/1359/4526/files/78641899204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/warunomovejaporemote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/40179869085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/47281465077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/20084139189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0927/2990/files/ocean_ofs_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/dowokajikozeder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/31482371846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/51251291699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/kakosusuwolutu.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_off00006776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 5652 bytes
SHA-256: a345a585161789c77fb855d108fb7e4629a2cf9493bfdb8b24b848ee2f1a12b6
font_01_sfnt_off00007acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 11180 bytes
SHA-256: f19b424240f1005602c1c6637443c904d55b2910f1f611c2e53df96f9b28e6bd

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