Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6a42ef082696f8…

MALICIOUS

PDF

40.7 KB Created: 2020-09-20 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b26e909bcebb76ac2c5b7cc896accda SHA-1: 036b5731973c8e061d1c8c346c15445ba6f8a585 SHA-256: 4c6a42ef082696f8891aa2afc52f1d91437bdf907186a37b731506a380f79806
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'certificate of employment hawaii' and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or distribution mechanism for malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

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.club/wix?keyword=certificate+of+employment+hawaii
    • http://jopanoj.lilmomentcaptured.com/uploads/1/3/1/4/131453718/05c4c6327a1ee.pdf
    • http://files.laisaycheese.com/uploads/1/3/0/7/130775062/8494142.pdf
    • http://siwipi.maldonanddengieramblers.org/uploads/1/3/0/7/130739919/kejuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/fegutulodotofu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/85910264897.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/45411951297.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/lysaght_roof_sheet_profiles.pdf
    • https://41b2fdac-5aed-4d54-871f-34ec7fa81a4b.filesusr.com/ugd/ce4b7c_143f130c39aa490999ccb15ae3ce024b.pdf?index=true
    • https://59070cf7-cad9-479b-945e-7b8b56d9602d.filesusr.com/ugd/dd4472_a9a0c6ccb3fd4ecd8f8a87fce7d59dde.pdf?index=true
    • https://9167db35-4a00-41e2-817c-9ef0ebb37661.filesusr.com/ugd/57c819_8861f487427d47b7a6a36791a612201a.pdf?index=true
    • https://15d9ef1b-58eb-4a75-98d8-ebacb1eb5471.filesusr.com/ugd/48bf55_2556a18602e74efe93b77f8353244ed4.pdf?index=true
    • https://6a9fb7e4-83fc-4dd0-b1c5-98d5770bb1a3.filesusr.com/ugd/d6af85_413287f9bf574e9389473a0ee27719c8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/37877842052.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/vifagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/jujibufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/xasewafawififolowofoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.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/
    • https://cdn.shopify.com/s/files/1/042

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006334.bin
d41b6bbe795ecc8f6c144c6704b59db2e4131d8ec9f4da51d5feec496ca62580
pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 5176 bytes
font_01_sfnt_off000074b7.bin
bc2d8922335711e8595a0a8b99da544681bd67b43476ce143f633b836a4b00dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B7 9820 bytes