Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5aa008ca9a96fd…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 06:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aadd3474c193f201b4df7f1f5e2009a0 SHA-1: 1b6cc459dad9b3e676a95a27e8b49bca9cd34f06 SHA-256: 9b5aa008ca9a96fd14b8098d751e1d9ae2a5fa80787703404ef62e3949e0efb8
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'hd screen recorder free'. This link points to ttraff.cc, which is flagged as malicious. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=hd+screen+recorder+free
    • http://files.95greenestreet.com/uploads/1/3/1/4/131438056/lavoxaxenuwin.pdf
    • http://files.routonsofhenrycounty.com/uploads/1/3/1/4/131483143/vomitujebazosopovisi.pdf
    • http://files.fluidplay.co/uploads/1/3/1/0/131070336/03ea8408cc359f.pdf
    • http://wuvegin.calcioinheels.com/uploads/1/3/2/3/132303382/239201.pdf
    • http://files.routonsofhenrycounty.com/uploads/1/3/1/4/131483143/vomitujebazosopovisi.pd
    • https://cdn.shopify.com/s/files/1/0431/9209/0784/files/14292242382.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/jemibo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/serial_autodwg_to_dwg_converter_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/yaseen_shareef_full.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/employee_salary_sheet_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/febefuxuxuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/56497935986.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/41370894213.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/27041525149.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/tapofobeg.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_off0000634f.bin
5f6f663f2404c299c2783adb8b2d2fbfd4c9a84c97e3331a3b31204a83ef5d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 4732 bytes
font_01_sfnt_off0000736d.bin
af81c44c7d46ad7cf741be9970eec3c7af0ffd885867ce91130b71bb7409ce3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 10400 bytes

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