Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad72cfa4a9f7208…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 00:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a064400371627edb9afe23396c64606 SHA-1: da46418ee427fe2d8a5c35479095a8f61249edf7 SHA-256: 1ad72cfa4a9f72089d71fa47f10f9879d4251eec6db6fa5fd46fe9187cd2f981
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=japanese+economic+development+theory+and+practice+pdf'. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of numerous links indicates a delivery mechanism focused on user interaction with external resources.

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=japanese+economic+development+theory+and+practice+pdf In PDF document text
    • http://files.amandajbarker.com/uploads/1/3/2/6/132695258/zabawijesot-mewuw.pdfIn PDF document text
    • http://files.ofp.cosmo-ufes.org/uploads/1/3/1/4/131407547/sopamafom_fosegaruzixe_doropivarov_nedipok.pdfIn PDF document text
    • http://files.stokehammondpc.com/uploads/1/3/1/4/131453855/tiboperusujox.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/1/0428/1604/5222/files/lemikuwufusomufoles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/42312113456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/jowokupanisopafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/zujugavesusileletejij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/51669613135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/jikumevexazese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/73565569496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/67563495912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/undo_jupyter_notebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bamizubonofosexewa.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
🗂 Part of campaign: cosmo-ufes.org 4 samples

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_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 5548 bytes
SHA-256: faea9d435057c67deaccaf4e24c9a87afa8d43be90fe8602d903e52eabbf9082
font_01_sfnt_off00007005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7005 10244 bytes
SHA-256: 94b0c82480ceec07db8312923337d8e2d0be0fb05d84db9453c5c09f92b48c41

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