Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a00b2ef29f4d67…

MALICIOUS

PDF

39.2 KB Created: 2020-08-01 22:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bae035577f926a5f98a2a1b6d5a66692 SHA-1: 4d3569de0379a5852a3baa6b099a8ac6bc747e8a SHA-256: 50a00b2ef29f4d67327d9e766f767de0d35e0b6e4e5f73c251adc7de7bdc2064
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=cca+in+r'. Another critical heuristic identified this as a PDF link farm, with many links pointing to Shopify domains, likely as a way to host malicious content or obscure the true destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=cca+in+r
    • http://files.barakacommunity.co.uk/uploads/1/3/1/0/131070842/suzuko_jetemiviwarepof.pdf
    • http://files.nonomurastudios.com/uploads/1/3/1/4/131437626/bitawa.pdf
    • http://files.lolaandco.com.au/uploads/1/3/0/9/130969993/f1eef6f703b.pdf
    • http://files.shoanlo.net/uploads/1/3/1/0/131070561/kowuladusixevi-buzukavobedeze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/duzipidunopigoweme.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/javelopuvibeginazug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/vapalavabel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/pumatevibujisonel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/19211119130.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/15177676798.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/trigonometry_6th_edition_mckeague.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/47021026104.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7026/files/wejes.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_off00005e85.bin
e28e6f9fd08e70e16fc7959ddfb9cb329eccf1a2bc13bc3d1a094504aa313b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 4488 bytes
font_01_sfnt_off00006dcd.bin
e5ea6c317a224fa313b96a5ca5adbcafa37b3904e0e25b663d5a25ffb6b561b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 10192 bytes

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