Malicious PDF — malware analysis report

Static analysis result for SHA-256 723f76e934653335…

MALICIOUS

PDF

61.1 KB Created: 2020-08-23 00:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a44a73c1edcc4d065be63542cb90cf3e SHA-1: c7dab1c045ca791ec3d11fa1008395e2ea954808 SHA-256: 723f76e934653335e7b6ff481f85805624666fc1d4950b8b5dbaf513c651096d
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, masquerading as a document about 'structure of carotenoids'. The primary link redirects to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.com/pify?keyword=structure+of+carotenoids+pdf In PDF document text
    • http://temujova.dandelionhousefloraldesign.com/uploads/1/3/0/7/130775934/c1bbfa16d2e2.pdfIn PDF document text
    • http://files.stevenparrphotography.com/uploads/1/3/0/7/130776769/9736570.pdfIn PDF document text
    • http://files.thegamblingclinic.ie/uploads/1/3/2/6/132682802/sevejikesi.pdfIn PDF document text
    • http://files.shopbudasreddoor.com/uploads/1/3/1/0/131070450/nedazodusokudosako.pdfIn PDF document text
    • http://dubowadi.mrseppenbach.com/uploads/1/3/2/6/132681670/gawedivotoxejunekuta.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/1/0431/7442/8827/files/79758436675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/daxajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3283/6256/files/jebexudutere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/xeforonigavivuwobolezibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/88082784876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/8733060812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/nijixujigakopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5936/3496/files/berliner_platz_2_lehrerhandbuch.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_off0000a3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AE 5220 bytes
SHA-256: 67bf5fda0b5285152fd0c0978c7d8ca551beefd0efb4090fe6bf74796c726d84
font_01_sfnt_off0000b577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB577 15940 bytes
SHA-256: b9827bdfa56b83f876bc173eb6e9d6cd7cf0633cec3b6a5555f904c6a2e95c93

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