Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf8b7d7dc55d6c5…

MALICIOUS

PDF

51.9 KB Created: 2020-10-30 01:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 67a709715d04c825f87ceeb6622086ba SHA-1: 0d6a07e6bf2dd36062e415d0d43f19d0512b7a7a SHA-256: aaf8b7d7dc55d6c5a4bcbe50d008c4c86a810efad5d7c9b9ba769d779fe32d28
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.link/pify?keyword=don+diego+de+la+vega+actor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8bf25c35ac8.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/wenape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8c836539653.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/7560669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f89e80258b78.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/d4c10aa63a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f87550743e77.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000660f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000660f.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000b4a2.bin)
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/wibexitulewox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45411615-22d4-487d-b1c7-c97918bdb822/suvakenigafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf2a054-df9f-499b-9327-dfdcaa07d79a/albion_online_armor_tier_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/790bc4eb-803b-4729-95a3-97056f24c318/ps3_emulator_apk_mobile9.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://dejavu.sourceforge.netIn extracted file (stream_005_off00009b9e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_005_off00009b9e.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000660f.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009b9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B9E 17228 bytes
SHA-256: 4bbfe4a5f8e05210f1fcdbdcc636b853c7a850975179513041e6e51b94978520
font_00_sfnt_off0000660f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 4776 bytes
SHA-256: f430da45ae9bf1007af123c2baa843ec00f6f7a86ef6a83bc3c77f7f2e387f52
font_01_sfnt_off0000765c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 11272 bytes
SHA-256: 72aecb4fb268b8e02be8f48d98494097d355aff91ae5b984cebada387d08a3e2
font_03_sfnt_off0000b4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2