Malicious PDF — malware analysis report

Static analysis result for SHA-256 a450d064290e4383…

MALICIOUS

PDF

61.0 KB Created: 2020-08-31 03:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638b24523b611aac9e8ea6d6b8f4d754 SHA-1: cff79c5e01101fe093d136b46a851256b0a1d75d SHA-256: a450d064290e4383df23619c038e77e7db84db894f4b76253254b9fdc551aa1a
120 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.cc/wix?keyword=el+libro+vacio+josefina+vicens+pdf'. This indicates the document's primary purpose is to lure the user to this external URL. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, further supporting the redirection attack pattern. No scripts were extracted, and the document body was heavily obfuscated.

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=el+libro+vacio+josefina+vicens+pdf
    • https://static.usrfiles.com/ugd/b7ab08_ee25425e3ffe401eb29b8c43f01dd49a.pdf
    • https://static.usrfiles.com/ugd/2ca09c_8c0c0767282a4a91941bc0977b168b27.pdf
    • https://static.usrfiles.com/ugd/b8c837_1797a17a8321472e953d95c1a1e07588.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d09c0aa0c0d4fd388fc63bcea15a383.pdf
    • https://static.usrfiles.com/ugd/917232_0f9dca6a9d094f968fc842c4d077ec50.pdf
    • https://static.usrfiles.com/ugd/4c1554_1a5d43634f304d9e94b9723009eddbf9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c8cd3e0f1784a58ab2cea819706dd8a.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_15521ca5cc044ab58bfff9d40a3a0dc9.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/97059079212.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/flight_of_bumblebee_transformers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/protein_structure_prediction_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/pdf_file_merger_app.pdf
    • https://static.usrfiles.com/ugd/bf0735_a529caa7b20a42088751157e01b17d39.pdf
    • https://static.usrfiles.com/ugd/57c819_98b1fbd23f694bf9b0231acffa343dc3.pdf
    • https://static.usrfiles.com/ugd/0a593f_35c961677f4c40848d368c54ef2ca5e2.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_off0000ad9e.bin
a7297e27480c93c1b3d03cb8e8baae3d6a5026a3d57911836b1f04b32517a112		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9E 5380 bytes
font_01_sfnt_off0000bff4.bin
923996a79d7d43fd9e5df15b8e9a57cd10d99a02f02906bb294ff7baecf517df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 11436 bytes

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