Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c62105658fb189…

MALICIOUS

PDF

38.0 KB Created: 2020-09-14 15:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 762223511ec9c0a5aa7296d4a9dd9e59 SHA-1: a86aad85740baffa683d4d9f20a1854bfa134de9 SHA-256: a4c62105658fb189c55a297ac58bfa79009ad28732492f4d1f8706dc383bde3c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'Nhtsa dui manual 2018' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm designed to improve SEO for malicious content. The primary malicious IOC is the redirector URL.

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/pify?keyword=nhtsa+dui+manual+2018
    • http://files.lacolinawalk.com/uploads/1/3/0/7/130739452/8833460.pdf
    • http://files.motherspantry.org/uploads/1/3/0/8/130874026/9261311.pdf
    • https://cdn.shopify.com/s/files/1/0457/0805/0588/files/ninej.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/58985782827.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/75931048276.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/advanced_computer_architecture_tutorialspoint_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/meiosis_i_and_meiosis_ii_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/fijolukogazejojavogabuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/22095306453.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/46312537912.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/72965806150.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/identifying_the_determinants_of_demand_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005751.bin
b6b198818943308c8716a6ef2f870ead318f2680c909aa659e0b2a651a5705d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5751 5460 bytes
font_01_sfnt_off000069be.bin
58f94a322aa7e39145aee7ce411f729abb8eb37a94c37a07b5f6af9feb3ad89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 9920 bytes

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