Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ccf81d526b1b4a…

MALICIOUS

PDF

72.6 KB Created: 2020-09-01 00:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68db56695bfe6d695fba772ab061542e SHA-1: 5a7eda76b7b3837a4ff3f066833100d7b6728c3f SHA-256: 31ccf81d526b1b4afbf2a21f0bab51a1bd17ac7c5e98e4097bd2beaa88e96bc5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The embedded URL `https://ttraff.ru/pify?keyword=basic+concepts+of+engineering+drawing+pdf` is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains this URL, suggesting a social engineering lure to a malicious site.

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=basic+concepts+of+engineering+drawing+pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/arcadyan_vgv7519_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/tukalodogijatitogadezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/wawedozovejeworebezodidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/89631384464.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/zizulejogagujapebega.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/kofodotuwibiw.pdf
    • https://static.usrfiles.com/ugd/63d3ad_6bee71851d34441baf2fa9c269efa9a4.pdf
    • https://static.usrfiles.com/ugd/1813b3_7646f43d962844a99ed8c31baa2924f4.pdf
    • https://static.usrfiles.com/ugd/09c3c7_22f0ab64e5c14e7194a3a7e37b9e74f7.pdf
    • https://cdn.shopify.com/s/files/1/0458/0130/8326/files/eagles_injury_report_vs_cowboys.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/windows_8._1_iso_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/mevasudagefeboran.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/mawafesomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/gijafuxavivozi.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_off0000cac8.bin
113e51b297f828d37dd1df27ffad6ba1847be377605113db7e2edb8dc67be698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC8 5432 bytes
font_01_sfnt_off0000dd68.bin
40f1d05c0b87195283989953fcf075ed04cef2f154ed5966810983b2d0c099be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 10048 bytes
font_02_sfnt_off0000ffc5.bin
fc3f618fe247a2d43deeaa8b38a1cef08f0d945faaf33df5eb97992fdd579049		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 16172 bytes

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