Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8f3eaaf566786d…

MALICIOUS

PDF

44.4 KB Created: 2020-11-02 12:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b5c6b0dbee62cf15b99edbd651d18ffc SHA-1: cca6b2cdc2d1f9ca8741f6ee636cea3ebec12332 SHA-256: 3b8f3eaaf566786dbd5e7e1dd76b5d8d47b3b1fcf76c45718b07dfc75297e080
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=2020+open+enrollment+medicare+dates In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8872ed46392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5f99e9ecf1bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f86f535798d2.pdfIn PDF document text
    • https://xatomurukazaj.weebly.com/uploads/1/3/4/3/134378662/de4972c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f9f825944196.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/648a44abab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5f9cbd3ab077b.pdfIn PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/kawomoxadujidiwoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/amitriptilina_para_migraa.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/antropologia_livros.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/morphology_of_flowering_plants_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/delf_b2_production_orale.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/49243811388.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/soursop_bubble_tea_recipe.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_off00006e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 5396 bytes
SHA-256: a7adb43c900e2e30c4c8fd3c2fec9c6dc6f32e06dc667b5933df940e6123a8ff
font_01_sfnt_off00008052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8052 10848 bytes
SHA-256: bc246d38098bc31a3d25cfd61195a4c3c9917265b902b8781ac7199eb697c76e