Malicious PDF — malware analysis report

Static analysis result for SHA-256 b672c021b2ec4c01…

MALICIOUS

PDF

41.8 KB Created: 2020-07-27 08:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4812a1c7bfb1cd9ec4ec65a2eb88c6ee SHA-1: 3080d0ab137b9b528af5a79e91e904c14cf511f6 SHA-256: b672c021b2ec4c01102950311347965c925ab4bd830c97ac17dff353fc1be99f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF SEO link farm behavior, with numerous links to PDFs hosted on Shopify. The document body, though heavily obfuscated, suggests a lure related to 'equal employment opportunity form template', aligning with the malicious redirector's purpose. No scripts were extracted from this sample.

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=equal+employment+opportunity+form+template
    • http://files.sarahtorti.com/uploads/1/3/1/4/131438500/7764193.pdf
    • http://files.stephanienogueras.com/uploads/1/3/1/4/131409909/5467653.pdf
    • http://files.radinaflowers.ca/uploads/1/3/1/1/131164460/2798759.pdf
    • http://files.ssls-eg.com/uploads/1/3/1/3/131378791/tiwopilapokuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/38997490629.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/zugozaxunixedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/wubugetikal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/67169296980.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8236/files/ruvumoxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/nosabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/53615218477.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/wozedabaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/gosuzitawolemise.pdf
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/wixixetojewonom.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/
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/67169

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066fc.bin
ad8d56f3eb6cd249e8c27ea87134e2360eef1d762f61f6f2d0f1f25aa17d5f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 4936 bytes
font_01_sfnt_off000077b9.bin
9a1b0b4001f9756a9951f0337f0b95c1319aa794b9253127856f0bae0c1b5a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 9944 bytes

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