Malicious PDF — malware analysis report

Static analysis result for SHA-256 236309fcdc01be52…

MALICIOUS

PDF

41.0 KB Created: 2020-11-01 13:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2a6b7a1e0b62435d259cff31aa6a5e1a SHA-1: 15e8ee9526b09e563117fad13c98948579fe0239 SHA-256: 236309fcdc01be52279c6a52b689b8478cd94030c55dd58d79d90c4d6d0ccfff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links, https://ggtraff.ru/strik?keyword=date+de+pessah+2020, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious websites or further malware downloads.

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=date+de+pessah+2020 In PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/9533200.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/ba8e4325599.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/c91e8e2ee73b6a9.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/1/0484/8677/6993/files/mafuxugujolalutivapuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/wixakejumigisekomi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/carla_bruni_you_belong_to_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/31879034543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f20334-f0f6-4b0a-b066-bf41651a6559/17149995163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c0a580-01e2-44bc-b2e1-8ed23f5c910d/gugineroxot.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/jowezedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1702670-db47-426c-86cf-52dceb7581b7/razer_phone_laptop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0105/2836/files/instagram_page_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/sumuwutijifuninudowisixok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6669/5071/files/harvard_business_school_case.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_off00006058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 5192 bytes
SHA-256: 32881dc209e50731d00b46d8b8e83b4c5840502cb8fd822d0662334008ae53ba
font_01_sfnt_off0000720a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720A 11168 bytes
SHA-256: ac83fa454838484d13cc4dd5fd2e0f35423f5edd557843fafb508b23f9278526

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