Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6aa5e19522b061…

MALICIOUS

PDF

39.6 KB Created: 2020-09-17 13:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a205d669520c7939a0b2db7ff11f6493 SHA-1: 42fed19aa29943711ff628eaabd5e05be24cd0c9 SHA-256: dc6aa5e19522b061814b5f6a8342bccec2b60dab96c3fa36af5d62b0849baf53
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=types+of+spinach+smoothies', which is flagged as malicious. The presence of a link farm and a high ML classifier score further support malicious intent. The primary attack pattern involves directing users to external, potentially harmful, content.

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=types+of+spinach+smoothies
    • http://nopene.tsrenovationgroupllc.com/uploads/1/3/1/0/131070374/gozajutomoxamebo.pdf
    • http://files.skincareboutiqueatfacestudioandwellnesscenter.com/uploads/1/3/1/8/131856158/bopaginen_filulixanobine_gogisuxopa_tivokamotogef.pdf
    • https://d6c417c6-372a-419b-863e-cc5078c9a63d.filesusr.com/ugd/69695d_b28cec74665f4912a0a8faeec221209d.pdf?index=true
    • https://5c8b1923-5b74-48fc-9747-97e97a82a7e6.filesusr.com/ugd/07625c_33fe16367bb440019f035d5373a9b859.pdf?index=true
    • https://88590ed5-44a3-4641-9a4d-3b46e1a1c90a.filesusr.com/ugd/c63bf9_23f77eb880c3471693046f3f6a078e53.pdf?index=true
    • https://83922c4a-7c0b-439f-860c-6f849fddc7cb.filesusr.com/ugd/370ea2_eb490514db9e47e5b756132255c06b99.pdf?index=true
    • https://a0ec6451-31f7-4747-9b39-d193ffdd38bb.filesusr.com/ugd/fedf23_129d313e52a446228ffe552fe5d18958.pdf?index=true
    • https://5b13355d-d69e-4f96-b213-69ac8a7c9f63.filesusr.com/ugd/501a20_f4de1d2745bc4414a20f5f137a5a9733.pdf?index=true
    • https://98ab69d5-d5dc-4e97-a748-7a560a69465f.filesusr.com/ugd/53c654_9cfd91f4ebb74e10a3b1ee123e70f285.pdf?index=true
    • https://449982d1-864a-49fb-9eac-d145ef859e9f.filesusr.com/ugd/89c6ad_dd1e06b7913645da8951eb08b6a95660.pdf?index=true
    • https://e191a511-2be4-401b-a8ff-8a7ba0c0756e.filesusr.com/ugd/ebcc4b_78cd136724b443cbb5684bac50be2799.pdf?index=true
    • 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_off00005da9.bin
f9a9be113ebf2845f7480f6ff89b7555df999e456b2a57c26ca4500e7e6a722b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 5180 bytes
font_01_sfnt_off00006f32.bin
0ce482d06bc911d3f1e485a7ddb058ad21a1227e468af5cb81d100ac5222ec84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F32 10168 bytes

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