Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f4546f127c3091…

MALICIOUS

PDF

42.5 KB Created: 2020-10-31 04:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb589396be4aad9b829d4201e6626853 SHA-1: dd3b399a9ceea2e69450925b6a6afa0ed26773e1 SHA-256: d0f4546f127c309195178bd5086fdf3d2c94cd058afdf49070bd772182071c15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious infrastructure, likely intended to lead users to further malicious content or phishing pages. The PDF also functions as a link farm, distributing numerous links to other PDF documents, suggesting a coordinated effort to distribute malicious content or manipulate search engine results. The ML classifier strongly indicated maliciousness.

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.
  • 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.
  • 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://gettraff.ru/123?keyword=the+3+g%2527s+of+colonization
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f938fccda673.pdf
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f8ac19552d01.pdf
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5f999533895f9.pdf
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/886e539.pdf
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87150e050dd.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/1c4d69.pdf
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/7975339.pdf
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f891d915f4b5.pdf
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f9a35c08f5ec.pdf
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f951022204db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/pugoxebiwura.pdf
    • https://cdn.shopify.com/s/files/1/0500/4764/7894/files/fiwereditujanataboxeso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/android_apps_to_customize_your_car.pdf
    • https://cdn.shopify.com/s/files/1/0268/8244/1410/files/15687541969.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ea.bin
6e95c33547d686194b0ee777075ef91cff59cccd2fde0e62fa1799d9dcfe96ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EA 5244 bytes
font_01_sfnt_off000078db.bin
934f4afd7badb7d4d42584444710479d69a40834f6a68f3110a0287bd2606c24
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 10956 bytes