Malicious PDF — malware analysis report

Static analysis result for SHA-256 069f2bf80b306e7b…

MALICIOUS

PDF

43.6 KB Created: 2020-09-10 03:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 20c3338a610b88f704d6c1d2a3a298ec SHA-1: 1673fe20ca293f571d32b68c8ca32f367072c6c0 SHA-256: 069f2bf80b306e7bcd121d220ac89bd60d885d70001df7dadc68fe94902f1e7b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, pointing to redirector infrastructure. One prominent URL, 'https://ttraff.club/pify?keyword=nintendo+ds+emulator+for+android+9', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains similar URLs, suggesting a coordinated effort to drive traffic to potentially malicious sites.

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://ttraff.club/pify?keyword=nintendo+ds+emulator+for+android+9 In PDF document text
    • http://febum.creepingmuseum.com/uploads/1/3/1/4/131483830/8949710.pdfIn PDF document text
    • http://sitod.therighttouchpainting1.com/uploads/1/3/0/7/130740387/tesokofamaz-viwejik.pdfIn PDF document text
    • http://files.ffcdelaware.com/uploads/1/3/1/1/131164130/movufozebexad.pdfIn PDF document text
    • http://files.augustapickleball.org/uploads/1/3/1/4/131453136/9318689.pdfIn PDF document text
    • http://vozev.sweetwhiskshoppe.com/uploads/1/3/1/6/131606165/3588354.pdfIn PDF document text
    • http://files.rotaryvillagesevening.com/uploads/1/3/0/7/130739789/setedujutivixep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/197ed4_32309e22677841d59465fa1903c5c110.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34e21e_6660096d7d584ff083aecddb122d967e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb103_6935770b7a6d4c00b3e32545c2f566e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bcfc12_0f44b9d695db4331bd5c93cfd8d6cd94.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e4eb4_233d399b514c4a9a9b3b85729e42b55c.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_off00006d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 5180 bytes
SHA-256: 8bdc2a8d3f247812f862be9d10f5cec0092a52f5e5bad841ce577bbddd85d191
font_01_sfnt_off00007ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED2 10316 bytes
SHA-256: 213564e9dfaee518449902ecee5ba8e99bf105e168a8a2bbb88a12cdcbe3af45

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