Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf34809c1c6cc92…

MALICIOUS

PDF

42.4 KB Created: 2020-09-16 23:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fc36f01ab7bc847974f9f58bf4ecbb4 SHA-1: 6f0f57bc6210e51380fbde4232619ecd1bd3d474 SHA-256: baf34809c1c6cc9244f48661d7ed36089f6ab95d3368ae9a0744a5d02a32a2ca
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and a title that appears to be a lure. The heuristic firings indicate the PDF is designed as a link farm to redirect users to malicious infrastructure.

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.me/wix?keyword=insula+orientalis+locked+door
    • https://cdn.shopify.com/s/files/1/0462/6389/4173/files/40286222242.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/xigeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/12377419514.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/4614982894.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/bacardi_mojito_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9421/files/celebrity_picture_quiz_questions_and_answers_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/pisiwunoberobuzufeken.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/descriptive_statistics_for_data_analysis.pdf
    • https://f6e2c2e0-aa19-40c0-a713-5c67bae158a9.filesusr.com/ugd/9e14ca_63aacafcaf8e4119b82929eb5251c697.pdf?index=true
    • https://3a2b0870-7901-41d2-b66f-9332f7f2bb5d.filesusr.com/ugd/eda9ba_22273d925f1244ada8fa1519f09db09a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/a_level_chemistry_eileen_ramsden.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/gmail_read_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/60313988457.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.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_off00006142.bin
9ebc7052b02113f3b7c16adc8089556d2bc9f11104a9bb94cab044cc4a678f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 1556 bytes
font_01_sfnt_off0000692a.bin
c1c8ed1dc365869fa23befbace380e4bd76f2b57270fd7b96d70b031e89889cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692A 4932 bytes
font_02_sfnt_off000079f9.bin
4907f79a6cb3b4a2ee2d653d2ad070afeefa20a3455d89a9d43b08dac2c70d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 10156 bytes

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