Malicious PDF — malware analysis report

Static analysis result for SHA-256 49079e7c85a2ad2f…

MALICIOUS

PDF

43.5 KB Created: 2020-07-20 02:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db00e9a24e1372496b05d3f34194ab3 SHA-1: a6f3651881aed8edfd01dc137a2e1a5c744300cc SHA-256: 49079e7c85a2ad2f70bebb81899f66072668cce80e73be524c3ff41d235bfc98
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to academic syllabi, suggesting a lure to disguise the malicious link. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

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.com/wb?keyword=amie%20section%20b%20syllabus%20computer%20science%20engineering%20pdf
    • http://files.shift-vibes.com/uploads/1/3/1/8/131856949/jajisiwufij.pdf
    • http://files.rockfishgrovefwbchurch.com/uploads/1/3/1/1/131164386/4647d.pdf
    • http://files.rdpresets.com/uploads/1/3/0/7/130740033/kivoduta.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/fuwufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/vavanutibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/76818131555.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://dozosemi.files.wordpress.com/2020/07/porusanojugup.pdf
    • https://selegug.files.wordpress.com/2020/07/filutotiwipoxazinali.pdf
    • https://wejaxan901614801.files.wordpress.com/2020/07/20679812923.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/larugerubojufobipuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/32142364458.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/27566773657.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/17380772859.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/penom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/dorobij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/10124882559.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/81554785618.pdf
    • https://cdn.shopify.com/s/files/1/0439/2956/7387/files/65852225117.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_off00006a3b.bin
0827b30e237e61af80c20476044c969a407418ef26a8a99156a90a2648313e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3B 5588 bytes
font_01_sfnt_off00007d1f.bin
f2be54ace95303501edd25b265866933b94ab0a0742e83392104c6b853b28b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 10212 bytes