Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b1ad928ee2c575…

MALICIOUS

PDF

47.9 KB Created: 2020-09-17 00:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce47087c571204de5120665b61ad5626 SHA-1: 6d576fa0d964ca25e97213523d9e7aaefeaa8720 SHA-256: 28b1ad928ee2c5757977cc312728d400b5a84294358a732960b6959fe72d39b2
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a malicious redirector. One of the primary links, 'https://ttraff.club/wix?keyword=mckamy+middle+school', is designed to lead the user to potentially harmful content. The document body, though heavily obfuscated, contains references to the school and the PDF creation tool, suggesting a lure rather than legitimate content. The presence of numerous PDF links further indicates a link farm or redirection strategy.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=mckamy+middle+school
    • http://files.crystalcovenrmp.com/uploads/1/3/1/4/131453998/3232106.pdf
    • http://files.chopsugar.com/uploads/1/3/1/4/131407194/gogawikumeni.pdf
    • http://dutokabu.mollyjgood.com/uploads/1/3/0/8/130813554/xepibokusaro-zujak.pdf
    • http://bixuzez.imagesbya2zphotography.com/uploads/1/3/1/6/131607131/01367ca2.pdf
    • http://files.buffalobabybums.com/uploads/1/3/1/1/131164456/5271255.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/tutorial_of_microsoft_excel.pdf
    • https://d5663809-13ab-4996-8690-3f838f5b3d55.filesusr.com/ugd/ebc5f9_994f127e6c5d47d98cadedad9ca680a1.pdf?index=true
    • https://01496b6e-ef0d-4a2f-a6fc-875274c2678e.filesusr.com/ugd/4c1554_06a58cfb1dc441f082156db9b3111136.pdf?index=true
    • https://77038a64-1c52-41f1-a7f0-4d0dd07c6eb7.filesusr.com/ugd/4f92c1_0fc4c9f710aa479c8a913d6de6ff8c48.pdf?index=true
    • https://7476bf1d-3e6f-4972-8b64-f0235ce338eb.filesusr.com/ugd/e4d7df_e2caf9ff13c24f63a159ef3ea6507feb.pdf?index=true
    • https://6ba6f6ad-0a36-4ab0-8018-28476b74c5c3.filesusr.com/ugd/31593d_00659d73571345babf0e2702ecc0ef81.pdf?index=true
    • https://59bebf05-6e65-4fec-81f2-8584752d0c21.filesusr.com/ugd/12745a_8a98442e22f24884acec7848107c2bb1.pdf?index=true
    • https://1e49d929-3365-4196-bddb-7e7dc7b3070a.filesusr.com/ugd/0511f5_0543a33cee6241dc80af20787c9cc44b.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_off00007119.bin
b5b29837ac6f8fe3c3e37829230af58f4ed7d6acfbdc70fa708ad36cad36e7b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 5252 bytes
font_01_sfnt_off000082eb.bin
6a0fc80d60b8fa34779d20ff60b6f28c096c7cd003f2392f5308c8e2a61df12e
pdf-font-stream PDF embedded font (sfnt) at offset 0x82EB 15588 bytes