Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b7ae36cc6d17d1…

MALICIOUS

PDF

39.3 KB Created: 2020-11-02 06:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-02
MD5: 5222cbfa373bcfdeb2f71ffb291bc643 SHA-1: 8f8ca87b18dd6655e67a02fc166676308c7de7f5 SHA-256: a6b7ae36cc6d17d13613d7d6b564c9b8d1def62ad50e8d9b7cdf3ae18fe65b88
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://ttraff.link/123?keyword=best+police+scanner+app In PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/kufod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f89e94f93b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f8de0b627558.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/pabagugiridepoluwaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5f979ececa05a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f8b9a8b3ce93.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/1/0497/9471/1705/files/73643158641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4364/2266/files/partituras_para_timbales_salsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7453/4552/files/asics_gel_tech_walker_neo_4_womens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1797/2123/files/volcano_experiment_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4219/5624/files/temokenu.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_off000058cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 4976 bytes
SHA-256: 0a60efa2d56695d82eb3e877e93d383d3f3593565a13876af1fa2fd1bd125369
font_01_sfnt_off000069c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 11100 bytes
SHA-256: 79b26f1b7c6f61d727591ee002f1d6ebf0deff91bdd864aebc967eccac50075d