Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c541ad58b67c292…

MALICIOUS

PDF

79.9 KB Created: 2020-10-28 14:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c77a02b353150e8351f33c33b885737 SHA-1: 1901a23abea7afbae0137986b14467c7a6bcc2c1 SHA-256: 6c541ad58b67c2928e5c742dcb04f12b147fe6ca8eabf3a8713f92bb4e7ed678
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One prominent URL, 'https://ggtraff.ru/strik?keyword=all+rise+next+episode+guide', is flagged as a malicious redirector. This suggests the document is designed to lure users to potentially harmful sites, likely for phishing or malware distribution.

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://ggtraff.ru/strik?keyword=all+rise+next+episode+guide
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/6248906.pdf
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5f95e72ad95a3.pdf
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5f98ddc9ed2d0.pdf
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/dogivujur-karikodalez.pdf
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/duxuwemigunivej.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/banuxol.pdf
    • https://cdn-cms.f-static.net/uploads/4416318/normal_5f973c9fac986.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8760272c74d.pdf
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/rasurokomusij.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdf
    • https://rewazuxaroro.weebly.com/uploads/1/3/4/3/134341361/pixabawum-gituseda-petodig-muwatiwujajogun.pdf
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f8e612940cde.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/jirefizawukolujoviziravo.pdf
    • https://uploads.strikinglycdn.com/files/3eb5356d-9233-4c75-9794-78e806f0f654/diwim.pdf
    • https://cdn.shopify.com/s/files/1/0503/2244/0360/files/rowalud.pdf
    • https://cdn.shopify.com/s/files/1/0277/3408/1726/files/digedad.pdf
    • https://cdn.shopify.com/s/files/1/0504/4083/1155/files/winning_eleven_2020_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0495/5006/5831/files/activity_3.2_unit_conversion_answers.pdf
    • https://uploads.strikinglycdn.com/files/13d8c08c-fca8-4f97-b64c-1a7ed262a823/9864849316.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/dremel_chainsaw_sharpener_kit.pdf
    • https://uploads.strikinglycdn.com/files/7f01f543-2bab-4b1a-aa76-c435602ace00/ming_hing_naperville.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_off0000f164.bin
01e214e9fd5ef4582bc7adb251675f4db7a52ffff74dec632d3d847f4ee41e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 4972 bytes
font_01_sfnt_off00010263.bin
205c85a25689b93652c09ad6b57f979378804d794bfbed0e1a23e461347945a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 15312 bytes

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