Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e180144e6b02ab1…

MALICIOUS

PDF

39.9 KB Created: 2020-09-29 06:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5399ba3d317acd884b9856b8760e8e1c SHA-1: dc6b0cfd8711afb0bc0d0eef7cfc282c6a72c4ae SHA-256: 8e180144e6b02ab13624a21f4aa4d604dcfcd6830736435c0d3d00f5aaa87c11
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Rectifier circuit design pdf' and the authoring application 'wkhtmltopdf', suggesting a lure for search engine optimization or phishing. The presence of a link farm heuristic further supports the attack pattern of using SEO to distribute malicious links. No scripts were extracted, limiting the analysis of direct payload execution.

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://cctraff.ru/mozel?keyword=rectifier+circuit+design+pdf
    • http://files.fycdepaper.com/uploads/1/3/1/4/131406391/0e835b0a.pdf
    • http://files.ronnytuvia.com/uploads/1/3/2/3/132302907/mavidirawe-rowedonuxegig.pdf
    • http://pufodez.computerclubrhcc.com/uploads/1/3/2/7/132740214/xitorigupidozuzanuj.pdf
    • http://files.matandnick.com/uploads/1/3/2/7/132712315/xutan.pdf
    • http://files.fresnobridge.com/uploads/1/3/0/7/130776180/pavoweter.pdf
    • http://files.lwyouthstrings.com/uploads/1/3/1/6/131636872/fewewudub.pdf
    • https://site-1036995.mozfiles.com/files/1036995/zivijududazazikugud.pdf
    • https://site-1036681.mozfiles.com/files/1036681/33917499319.pdf
    • https://site-1036977.mozfiles.com/files/1036977/bapanuwixobugu.pdf
    • https://site-1037059.mozfiles.com/files/1037059/49959796979.pdf
    • https://site-1036972.mozfiles.com/files/1036972/naguwirikanenubefidugev.pdf
    • https://cdn.shopify.com/s/files/1/0461/0487/1076/files/formation_agent_immobilier_finance_par_pole_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/can_can_meniu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/balloon_worksheets_4th_grade.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_off0000602a.bin
4440bc0d239d5c934fc6dcbd95cc60d4b408101d49965a36d60a86b68aeba570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602A 5088 bytes
font_01_sfnt_off00007194.bin
acb20ed2e35388342d27a9181ea3ba416174cf525b1573118857679615f2e0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7194 9980 bytes

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