Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a31713925e06c6…

MALICIOUS

PDF

41.2 KB Created: 2020-10-29 03:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5bb6976e32cc8dfd151383e0c721a5bb SHA-1: 9d77c2cf0f54856bd6f2d533f56891e6ec4ea6f1 SHA-256: 25a31713925e06c68c3d578ef8f8bb224d93fed962a3e072980918801a50abc4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1553.005 Security Software Installation

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document also employs social engineering tactics, instructing the user to bypass security measures or execute commands, consistent with ClickFix attacks. The embedded URL https://gettraff.ru/strik?keyword=what+is+toggle+overlay+discord is the primary indicator of compromise, likely leading to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/strik?keyword=what+is+toggle+overlay+discord In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f8963ee844bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f980ba2e0ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5f9651e7d343d.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/pazifetanegapu/29207133564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/invisible_keylogger_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/64973823849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1895/9048/files/46680451445.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/54113298600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/charter_tv_ref_code_s0200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/working_principle_of_gas_chromatography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8153/4102/files/graphing_systems_of_linear_and_quadratic_equations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8628/8296/files/tefuvufarodusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c54f85-22a4-40e7-98a2-e66b7b0edb8c/goxatodukel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83260c62-27ed-4098-8f61-6d4517f2ef84/mixipesoxanaxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a280a9-d1b4-4dfc-9980-0be6ead9d492/vetuwaropepavukozegozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1682/8581/files/zosonufaponasudotel.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_off00006175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 5376 bytes
SHA-256: b79112cae2be4b86c663ac532806285b306b22589dd46ced2d9416f3fd2a46b9
font_01_sfnt_off000073ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 10552 bytes
SHA-256: b9f19e689cb55fe1d80c529b168a8785e03e1d164b49dec182f3fe89e8a29062

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