Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dde9211fbb8362…

MALICIOUS

PDF

41.6 KB Created: 2020-09-08 15:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d46840552c9d57f69ddacc3ccf2cae SHA-1: 8369134d9fce31248d9d1801ada7b50acd018547 SHA-256: 82dde9211fbb8362f8103d529a438c91b792c783ca84df1ba9c0f4474e37953d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=agent+vinod+film+songs++pagalworld`. Additionally, it exhibits a PDF link farm pattern, with numerous links to external PDFs, including `https://cdn.shopify.com/s/files/1/0436/4946/6526/files/numenera_rpg.pdf`. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious 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/wix?keyword=agent+vinod+film+songs++pagalworld
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/numenera_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/protein_metabolism_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/36841081348.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/basic_knowledge_of_computer_application.pdf
    • https://static.usrfiles.com/ugd/7cefa9_bf1a865b761e4c2781f9f4671aa62768.pdf
    • https://cdn.shopify.com/s/files/1/0436/3275/4841/files/brightsign_supported_formats.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/bert_herring_fast_5_diet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/cambridge_o_level_chemistry_notes.pdf
    • https://static.usrfiles.com/ugd/3402b1_dfca835119114e4b88799def4e90b4e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ef6ccba5964ecfb694e2da3c44c52b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f7a.bin
8b4fa95e41b3dca6f7c42c794d3d75ee83d7feb29a9ec968cd17bbc575cfca08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7A 5500 bytes
font_01_sfnt_off0000623b.bin
93ba284de89858556a3a9283380d25cd0b59541cbbba24d40cdcd954d6db9e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 9920 bytes
font_02_sfnt_off0000847c.bin
1dc3e4c0df5ca4cee3a891f28fe896d6b16a951626fb4346f09e4ab97736c5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847C 16132 bytes

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