Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35cab0f7936f12a…

MALICIOUS

PDF

39.4 KB Created: 2020-08-10 23:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29da873b0b430c9d2bd10c4155e5d51f SHA-1: e7aa97b36d4e9d381db399e81200515fe1a779b0 SHA-256: d35cab0f7936f12a56153c606334ff80627886b209c3b0218f1a6a5da24ae893
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users. The document body, though heavily obfuscated, contains the malicious redirector URL and several benign-looking Shopify URLs, likely used to mask the malicious activity.

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.ru/pify?keyword=ada+diabetes+guidelines+2020+pdf+download In PDF document text
    • http://files.synergymedicines.com/uploads/1/3/1/3/131379296/8786241.pdfIn PDF document text
    • http://files.ruthscheuing.com/uploads/1/3/1/4/131454696/2215348.pdfIn PDF document text
    • http://files.leatherworksfordogs.com/uploads/1/3/2/6/132682070/segunexevanisew.pdfIn PDF document text
    • http://motomike.sweetreams.net/uploads/1/3/0/8/130873995/213c3f7c5fe3.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/1/0433/5599/6328/files/14913965191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/16372108926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/85357906889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/fade_to_black_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/95940881593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/11685373257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4774/6726/files/66091974547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/2990708282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/batho_pele_principles_kzn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/94863792287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/jakawuluragozebugebigoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/comic_storyboard_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/mesikidagifizojukadu.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: leatherworksfordogs.com 3 samples

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_off00005b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B27 5608 bytes
SHA-256: 455b4a436d9a9e09104516f307623b88c38bcc198e5979736c51cc93f932f9fb
font_01_sfnt_off00006e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 9960 bytes
SHA-256: fc165ebb64295cb0e2fc121f82b1ff96921b547a6ed073b1c05bd10a9ab80750

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