Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f27fefcac465c9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 20:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c405a84d9e398e01e3a115bfbda48f4d SHA-1: c54564379c71bce1c7db7dafc86bb20e90e9c30f SHA-256: 32f27fefcac465c9fe96ec37fa92d6e44b8dbc4bf6c8b3f12a299244ab4d0aa5
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=tascam+234+and+238'. Additionally, it exhibits a PDF link farm with numerous URLs, many hosted on Shopify, suggesting a potential SEO manipulation or content distribution scheme. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=tascam+234+and+238
    • https://cdn.shopify.com/s/files/1/0462/7618/2165/files/thanksgiving_worksheets_for_4th_grade_free.pdf
    • https://cdn.shopify.com/s/files/1/0464/5231/0184/files/nasonudakusizaja.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/agricultural_mechanization_and_machinery_management.pdf
    • https://static.usrfiles.com/ugd/b8c837_03a38d3ee55f42c0881c854eeebf817f.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9540/files/comment_fusionner_deux_fichiers_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/mother_teresa_biography.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/28001908562.pdf
    • https://static.usrfiles.com/ugd/cafc24_cef9a3bab7ea447ab23f7019d17635af.pdf
    • https://static.usrfiles.com/ugd/b8c837_a63b82a98b914fb991d472d2cc6662ab.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8ad31f76fb6b43e49fa6f44b10666cb4.pdf
    • https://static.usrfiles.com/ugd/97493d_00bc52f8194545f4b3c8f42f6d04e0df.pdf
    • https://static.usrfiles.com/ugd/b8c837_104ba1b2b00b40cab1152d3abcee4455.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_off00006cdd.bin
62d256d5c271ffaf47dededa608a8d8bea7d1014657cd7a9c04c5b98529f24dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 5484 bytes
font_01_sfnt_off00007f6d.bin
9f38a78affdc58ce73a5903cf50aeb6b60a44ba43c07883fb2cc03530db7b23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6D 10640 bytes

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