Malicious PDF — malware analysis report

Static analysis result for SHA-256 862be298dfe11d87…

MALICIOUS

PDF

33.8 KB Created: 2020-08-08 12:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c133081e4e9feb2d62a7d4a1b1e2d794 SHA-1: 72c361cf805ba6d1b591dffa9a497ffb8df23d76 SHA-256: 862be298dfe11d87d8cb036a7277860071fc651e0040d2b4fe1d9b58feef8f79
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links to external resources, masquerading as a document about blouse cutting patterns. One of these links, 'https://ttraff.ru/pify?keyword=blouse+cutting+in+marathi+language+pdf', points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=blouse+cutting+in+marathi+language+pdf
    • http://files.inthelaughterlocker.com/uploads/1/3/0/8/130873943/bef33409e29.pdf
    • http://zodipege.sciencewithmorris.com/uploads/1/3/0/7/130775934/1809283.pdf
    • http://files.bertieandolif.com/uploads/1/3/0/8/130814605/7a55d.pdf
    • http://palajob.whatdancecando.ca/uploads/1/3/1/3/131379732/zinanusabefato_dodibobi_mebumibewozabeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/mifofomavuzumawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/nuwaxiwetaga.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/jiporuper.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/72428358260.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/7053457587.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/35765993199.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/nutomiruda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/electrical_design_engineer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3981/files/xenosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/sabupewexuxupunewixosipok.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/83368800303.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004814.bin
d5629cb3c37eb5e969143080838e36e1e7c9bbacb4c44a787f47b51834cfcfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4814 5616 bytes
font_01_sfnt_off00005b05.bin
4eb54636efbeb4b5882668a84a8943d01c241b6129a772a5b2b499d3ccbb6206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B05 9168 bytes

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