Malicious PDF — malware analysis report

Static analysis result for SHA-256 723c7ab28c718c7e…

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 15:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81579a9038612aa7adec1e81e473b83e SHA-1: 314b07ed8462df10c1b779146a227977fa0e5bee SHA-256: 723c7ab28c718c7eac0c217f463c4091952726121d7d32d3afcb407cd1709932
194 Risk Score

Malware Insights

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

This PDF document employs a link farm strategy, presenting numerous links to other PDF files hosted on various domains, likely as a lure for users seeking free downloads. One of the primary redirector URLs identified is https://ttraff.cc/pify?keyword=aristoteles+pdf+unam, which is flagged as malicious. The document's structure and embedded links suggest an attempt to drive traffic to potentially harmful content, aligning with phishing or malware distribution tactics.

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=aristoteles+pdf+unam In PDF document text
    • http://files.hikaricreative.net/uploads/1/3/0/7/130739764/8723732.pdfIn PDF document text
    • http://files.woodcraftbybean.com/uploads/1/3/2/6/132696128/f9446121f.pdfIn PDF document text
    • http://gagade.visitgoringandstreatley.co.uk/uploads/1/3/1/0/131070786/tiwowogijipeti.pdfIn PDF document text
    • http://files.milecreekfarmsixmilesc.com/uploads/1/3/1/0/131070144/e5f870807.pdfIn PDF document text
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.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/1/0436/4258/5241/files/mathematics_textbook_for_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/fasuvulerugeranisawexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/20076725646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/zerodha_varsity_technical_analysis_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4948/9308/files/atividades_de_alfabetizao_para_imprimir_em.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/antony_and_cleopatra_themes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/43021701572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/ultimo_edital_da_prf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/sumepebikuvifasadif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/mozaxemajubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/c_open_text_file.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_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 5176 bytes
SHA-256: 5e429c4f4ee310fad18fe2faafdde582925b0f10c83d2b1eedc6d92f427c950d
font_01_sfnt_off00007060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7060 11164 bytes
SHA-256: 6427d413a9eff5ad72af34725219cd6deb698af1ae6610445cbcc18a99c07280

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