Malicious PDF — malware analysis report

Static analysis result for SHA-256 137065c332b6a8d4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-06 14:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1a2de1f0555aded894e430a47162128 SHA-1: e7c4ad613da809bd8c153afabb09ed39119b9160 SHA-256: 137065c332b6a8d422c6afb17d7d3d942b536ede74f755c1d0d04d0d271c1c94
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. One prominent link, 'https://ttraff.cc/pify?keyword=artefactos+nicanor+parra+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure strongly indicate a malicious intent.

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.cc/pify?keyword=artefactos+nicanor+parra+pdf In PDF document text
    • http://files.dessertdesignsbygisela.com/uploads/1/3/1/3/131384279/5042269.pdfIn PDF document text
    • http://files.wxrringtxn.com/uploads/1/3/1/8/131856257/mekumokololuxo.pdfIn PDF document text
    • http://files.dukesroyalguard.com/uploads/1/3/0/8/130814510/2876163.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/1/0430/2677/6227/files/gufabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fawalonilon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/vigarelemuvulit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/precalculus_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/91220720691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/runodap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/runoxetevajegufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/3140905937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/8840054143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/wiwiganojukatasuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/30998885240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/jujegugotakevusugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/54409232160.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_off00006976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6976 5104 bytes
SHA-256: d66adb44075c954d8f2c383ed941a991b4994bfcd90f9ed079d92208a684bf39
font_01_sfnt_off00007ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 11428 bytes
SHA-256: 1f1d17f06047380d066507ea62f4246a3b17bcf28288f4e10704e10883074cf8

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