Malicious PDF — malware analysis report

Static analysis result for SHA-256 df231bcfd45aa812…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 12:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ca42f89d829d8e142704dbd4c07922f SHA-1: e93f8cb099f668ae9c0e58860952845570e1a701 SHA-256: df231bcfd45aa8121a5439d5a0fee738cae0db0d9a4b719f62aa4e18ddbd04e3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=aprendizajes+clave+pdf+secundaria'. The document body and embedded links suggest a tactic to drive traffic to potentially malicious or SEO-farmed content. No scripts were extracted, limiting the analysis of direct payload execution.

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=aprendizajes+clave+pdf+secundaria In PDF document text
    • http://files.wellthplanner.com/uploads/1/3/1/3/131382590/6686412.pdfIn PDF document text
    • http://files.tubmannaturecenter.org/uploads/1/3/1/3/131398117/molam_rosob_fapisijul_wobul.pdfIn PDF document text
    • http://jatexix.dancearama.org/uploads/1/3/1/6/131606349/madugax_jebederegofe_tutabonugir.pdfIn PDF document text
    • http://files.meghanercolanolcsw.com/uploads/1/3/0/8/130874205/pubenuwemoxe_tavadaluki_xiwesif.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/1/0437/0310/7752/files/desofefaxepemavimex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/perpajakan_brevet_a_dan_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/90924192905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/42404718635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/bebepukisatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/wokulevijuremazufexafidax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/xoxinepojutipuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/17692242762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/budget_management_accounting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/40389892862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/renefitavok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/cisco_catalyst_3850_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/74222314495.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 3

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_off000067e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 5324 bytes
SHA-256: 4ffbaccfdfa7a427fb48559e9f24d4729bc1c1c2a10225bae1ba1516bfddaf90
font_01_sfnt_off00007a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 11520 bytes
SHA-256: 079e642c218a0d8a1cafa6c109833845dc63d9369c46b9a8e76a60a5d11d1619

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