Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddf3993dd58eea4…

MALICIOUS

PDF

35.7 KB Created: 2020-10-02 10:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-26
MD5: fae41f73ed8f4158ec14eb090f50629b SHA-1: 1e83957eb474529c766e7babac9a9ee692b1ac75 SHA-256: 3ddf3993dd58eea43be89002b7294e988d2c92ad08d06e9f6dc2b66f25695766
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://ggtraff.ru/strik?keyword=affinity+designer+workbook%2528+english+pdf In PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/kuwatonegekirisatet.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/40683855193.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/28456975964.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/lupudaxususodudujalexalak.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/jewurisilokivelo.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/1/0428/6464/0159/files/chemical_equations_and_stoichiometry_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9088/9889/files/64847148479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2238/6069/files/black_and_decker_portable_power_station_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/letters_from_santa_shark_tank.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_off00004dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD0 5556 bytes
SHA-256: 63d48630078bb3543887a0e0ad9e359e7e247c4d0c2d04c072cc8dc0512ac097
font_01_sfnt_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 9780 bytes
SHA-256: 84f3863db8b423f4d5de3a127c984625eaafe763142ea45372ad11870b8b7800