Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d8234f1f3d48eb…

MALICIOUS

PDF

72.5 KB Created: 2020-10-01 03:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bc9248fa9d9d9b90b56919c97a8305b3 SHA-1: b7d1bbf4545b34d8ec26a4d17b1171970ad6929b SHA-256: 17d8234f1f3d48ebcfd1b27e47afb4758a6cc05fc351955e91d62c65c8390d49
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=functional+approach+to+management+pdf In PDF document text
    • http://files.theperreaultfamily.com/uploads/1/3/0/7/130739457/e2a077a.pdfIn PDF document text
    • http://sezuko.walkthruyoga.com/uploads/1/3/1/1/131163763/2949964.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/1/0465/1194/7926/files/decoracion_de_casas_modernas_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/dare_keepin_it_real_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3703/0560/files/77041365872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4836/5214/files/libro_antologia_del_terror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/19169946119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/85193655903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/bikig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/nasakefibewajadawug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2440/8730/files/doxujilenixogimulakutidu.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_off0000dfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 5348 bytes
SHA-256: 6b71136aaf14131394ca2ead8aa5c2b6ebe3a3fe3eda070853cab04f359407ec
font_01_sfnt_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 10288 bytes
SHA-256: 650f42918d02e4bb873fa85571a1fd1498c9f1a890d92b71da61ce316a58f942