Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b7bea7253473d3…

MALICIOUS

PDF

53.1 KB Created: 2020-10-12 13:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 42857524c62e98939b285f879ece1806 SHA-1: 4df0dc004c19f51ceb058c53c36b7123b6c698b7 SHA-256: 72b7bea7253473d35e85717c52b6fee42021c7a6de4a43e62a77f951c9bc9241
194 Risk Score

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://cctraff.ru/strik?keyword=gesti%25C3%25B3n+documental+y+archivo+pdf In PDF document text
    • https://site-1038395.mozfiles.com/files/1038395/22077089615.pdfIn PDF document text
    • https://site-1040143.mozfiles.com/files/1040143/96336008292.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/fetalixumono.pdfIn PDF document text
    • https://site-1041492.mozfiles.com/files/1041492/wubexejelus.pdfIn PDF document text
    • https://site-1041852.mozfiles.com/files/1041852/46221897922.pdfIn PDF document text
    • https://site-1038910.mozfiles.com/files/1038910/vasufe.pdfIn PDF document text
    • https://site-1042832.mozfiles.com/files/1042832/wujavowi.pdfIn PDF document text
    • https://site-1042875.mozfiles.com/files/1042875/47631971231.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/8145433957.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/97900491245.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/sawerobozu.pdfIn PDF document text
    • https://site-1044162.mozfiles.com/files/1044162/86086655483.pdfIn PDF document text
    • https://site-1042940.mozfiles.com/files/1042940/59847009257.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/1/0493/1626/6150/files/dyson_dc17_maintenance_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9731/2424/files/golden_fishing_rod_dragon_adventures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/48836038472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5817/4883/files/kesefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/gezimatinajozimu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D49 5724 bytes
SHA-256: 5843b6bd13649f6ec2729dc6d60f2e38a28ae2073e896ff19759bac7566d7e77
font_01_sfnt_off0000a065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA065 11196 bytes
SHA-256: b8d00b642b6f13dcd356f6f7c54d56cc3dd6da256714eb1ccc4d62766458a899

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