Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c183988bd8857f4…

MALICIOUS

PDF

42.5 KB Created: 2020-07-27 00:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7697ecd2a8b68f13f58d20fff08cb6c9 SHA-1: 45e07e1fdf728a26ba2632396345e1f189fdf72c SHA-256: 1c183988bd8857f4d6c70334131d3efdd92834dbeee02c3f879b88d6754f23b0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, ttraff.ru, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a worksheet, suggesting a lure to disguise the malicious intent. The presence of numerous links and a malicious redirector indicates an attempt to drive traffic to potentially harmful 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=quadratic+inequalities+worksheet+doc
    • http://files.virtualrealitysensation.com/uploads/1/3/1/4/131453588/bb5356794.pdf
    • http://files.quicuisine.com/uploads/1/3/2/8/132814138/98d7119ac.pdf
    • http://files.leicester.church/uploads/1/3/1/4/131437147/zuzewosuvatodip_xiboxen.pdf
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/49055950677.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/86051702719.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/45564824321.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/48844383709.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/52620999293.pdf
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/68617274947.pdf
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/latedipowofiwipaxowalupiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/fineladizez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/junerud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/49873823950.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/11687711126.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/1/0430/4420/8797/files/52620999293

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c24.bin
2b8ff1811acfed2c41a5334da2fe24ede74d6eb6aaa7436a5620d4341a0fe83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C24 5252 bytes
font_01_sfnt_off00006e03.bin
2b5db28656de1ce965f0351bad37b52c500f1f2d5ec3e6e2bb165b1ad78fab99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 14248 bytes

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