Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3af6193e7ac43e…

MALICIOUS

PDF

47.5 KB Created: 2020-08-11 01:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c11b2c289e48b0156dbe1e54b72624f SHA-1: ced383ddb6212543ffc2c05e906e2ede4304f88a SHA-256: dc3af6193e7ac43e5c5f4ae044518f889066d9bc1c980952d8672cd0b092b127
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. This indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting. The document body, though heavily obfuscated, contains the suspicious URL and appears to be generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of a link farm heuristic further supports the malicious intent.

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/pify?keyword=srimad+bhagavatam+in+tamil+pdf
    • http://files.jockmuir.com/uploads/1/3/1/3/131398010/galituv-woxizefoxit-xininesagexup-senoloxinus.pdf
    • http://files.carolinacavaliers.com/uploads/1/3/1/3/131398134/wiwusepitenunatirebe.pdf
    • http://files.kgsstone.co.uk/uploads/1/3/0/7/130775310/b5578c.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/13106944724.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/gojulise.pdf
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/balancing_redox_reactions_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/95945593148.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/arduino_for_dummies_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/36147278242.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/ampere_s_circuital_law_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/selutuvifavesizo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/hp_10bii_manual.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_off000060e0.bin
fb0a1629c79a4d99ba7ecd0d8372558b06ef8dce7613c9007213fdc673223f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5580 bytes
font_01_sfnt_off000073b7.bin
e39bff5156159b1a8b48cb03ad538e60290b9c09de4e98f7e825a99ebf4d4682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B7 12116 bytes
font_02_sfnt_off00009c7c.bin
e6b7f32c790fe83805c50a9c3af83ca67c6b6c1c40107d85014b7adae9f5370b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7C 16060 bytes

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