Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7724117ca7f9b9…

MALICIOUS

PDF

925.3 KB Created: 2020-08-10 23:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e51d6ab2fc70122fdadcdafa57b3cf6 SHA-1: d61f4cf19bdaf382ecf82d85af8a808050a81918 SHA-256: 3f7724117ca7f9b93b72e465fd078f46eb1a5d45640da7b7b70f2f66b55dac36
142 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it links to known malicious redirector infrastructure, specifically a URL associated with phishing or malware distribution. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The ML classifier also flagged this PDF as malicious, supporting the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9138

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=valvular+heart+disease+and+anesthesia+pdf In PDF document text
    • http://files.unpsoccer.org/uploads/1/3/0/9/130969889/3353318.pdfIn PDF document text
    • http://files.snazzycakesedibleart.com/uploads/1/3/2/6/132681482/6102841.pdfIn PDF document text
    • http://files.redbudpartybarn.com/uploads/1/3/1/4/131452842/katuzur_tufilelora_sabukobulaj_rujevezeze.pdfIn PDF document text
    • http://files.murraywoodscuteachingportfolio2020.com/uploads/1/3/0/7/130739116/vupex_reziregunarabu_fadomojeju_sizozavovudiret.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/1/0431/6656/4503/files/winnie_the_pooh_1926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/96114797879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/cours_sur_les_barycentres_1ere_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5346/9083/files/effects_of_globalisation_on_education_in_zimbabwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/tabloid_junkie_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/mulixozivowixibotet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3478/files/applications_of_gis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1791/7848/files/31116348874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/29484569538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/dejukupudibirevujivutado.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 7

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_off000e1e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4A 5152 bytes
SHA-256: 1c23eec694d1fe6ca36aa71a31a588c21d8e62b183fbc8ebdbe2bd49a3f81a01
font_01_sfnt_off000e2fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FDA 15952 bytes
SHA-256: 61c4b2e3cebbd9a39bd08dc08ac089cb18fe285eab41623ea9dad1d7d71eaee4

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