Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f6b391be911229…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 14:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b431131d32fb0392b4922457afdbfa95 SHA-1: 5e6acbbf26819d55f0acf8a4ae4c849059ad4bef SHA-256: 45f6b391be91122954416b0bb246d190dfdcbb7e8951945229e40b843254f681
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that triggers this redirection. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

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.cc/pify?keyword=albuterol%252F+ipratropium+davis+pdf
    • http://files.egatecoc.org/uploads/1/3/2/6/132695392/rikuno-kuzoko-dafewadogiwit-tikojeke.pdf
    • http://files.woodland-creative.com/uploads/1/3/0/7/130738753/2ecd8c384dab0.pdf
    • http://files.uvcheer.com/uploads/1/3/1/3/131379590/4996938.pdf
    • http://files.calvaryslofamilies.com/uploads/1/3/1/4/131411197/sukofabuva.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/mufofadifiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/18485681562.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/template_for_index_cards_5x8.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/fujewotipakofazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xavugipakogimoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/73703550336.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/93052009306.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/clinical_interview_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/xifiwipobisegemuworesu.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_off00006953.bin
8833ac890dae47411ae139e2c8670d7384326be7640a44713497910b2136e40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 5412 bytes
font_01_sfnt_off00007ba6.bin
2c5cc196586eb56f32a70c1c5dda01d49551a172d4a8dbe62e439b876249d573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA6 10132 bytes

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