Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa1d4490a8b3360…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 19:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a8e1c4569a3c566c25a61dbdf6807cc SHA-1: 45109f61aa48ac4b7a898707b959b76a26e2234f SHA-256: 4fa1d4490a8b33604149c17f640a125950874e3ff9f7f83355e54e63ef4c0c3a
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'free sheet music christmas carols' and the malicious URL. The primary attack vector appears to be social engineering through deceptive links within the PDF, leading users to potentially malicious sites.

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.ru/pify?keyword=free+sheet+music+christmas+carols
    • http://files.dirtypawprintsaussies.com/uploads/1/3/2/6/132682295/jinubepedowivu_lorut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/mcdonalds_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/3723966506.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/64762281371.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/xagiwarufulogak.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/nunekasenitujoxuwes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/74499021422.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/akaike_information_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/17146652408.pdf
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/2150835234.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_off000062c0.bin
30a44580cbf4ddc8acd35914e07cbac44a7311ec01b01b39a6aaf5d72f93f922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 4992 bytes
font_01_sfnt_off00007395.bin
7ba18a572148121ae9c3f021e5a7e39f22ff1d049a357b40f23788b6b86fdaa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 13372 bytes

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