Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3cd45a3f85eebb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 07:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ceb150778bc289490514dbe2ae3f8c36 SHA-1: 04277f093024cfe013f713ebdd05fd0a6a690916 SHA-256: dd3cd45a3f85eebba3381863f20a0ce785d6cb64bda64e82c20b3a8360776d43
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, which in turn points to a malicious URL. This indicates a phishing or scam attempt, likely to trick users into downloading further malware or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=social+benefits+of+volunteering+pdf In PDF document text
    • http://files.wesleyclass.com/uploads/1/3/1/3/131380627/35a601fa8bc4d0f.pdfIn PDF document text
    • http://files.ramblingsofthepen.com/uploads/1/3/0/7/130740316/pokesisomewegup_jemoj_tevepaveni_limekufivekudel.pdfIn PDF document text
    • http://files.knifemakersireland.org/uploads/1/3/0/8/130873715/2156944.pdfIn PDF document text
    • http://files.bikerstoreuk.com/uploads/1/3/1/8/131857199/lofedowopelej_nitavurodo_fejido.pdfIn PDF document text
    • http://files.lusialatuconsulting.com/uploads/1/3/1/3/131383575/koluwulas.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/1/0431/1865/7703/files/59834105846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/abstract_data_type_in_c_with_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/schema_electrique_ascenseur_otis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/18988238627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/81505698760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/mugasibet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/34712784517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/roreganudazufajojege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/78765941418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/kisokimulomar.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_off00006d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 5624 bytes
SHA-256: e90151dae9d72b95af0f601d1ee792365eee0d330c1a8a0844c52b364b3de9cb
font_01_sfnt_off000080ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 10676 bytes
SHA-256: 9fe737c0cede662cf6c29182ce312dc0e38b87efa2850b30d18c316f8319f428

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