Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ea47839b14b9be…

MALICIOUS

PDF

33.9 KB Created: 2020-08-09 04:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b013126a5059047155098529dd1b6a64 SHA-1: 046e509e970be1d14a68935c58fb531fdca8b630 SHA-256: d3ea47839b14b9be993eab40c28897e54f87bfee7dc98e49955e12e04d7d5fdd
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=cambridge+basic+english+grammar+book+pdf', is designed to redirect users to potentially harmful content. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. 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=cambridge+basic+english+grammar+book+pdf
    • http://files.opus48choir.co.uk/uploads/1/3/0/7/130739022/solegokawazexel.pdf
    • http://files.steadfasttattoostudio.com/uploads/1/3/1/3/131380786/xorubedosopino.pdf
    • http://files.satchelcafe.com/uploads/1/3/1/4/131437632/gerolamuj.pdf
    • http://files.colourdance.net/uploads/1/3/1/3/131398125/movus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/22915576748.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/71171861124.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/48625514920.pdf
    • https://cdn.shopify.com/s/files/1/0433/3499/2025/files/mail_today_epaper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/xonoxif.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/20511536424.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/babulal_nagarmal_satnalika_foundation_scholarship_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/87098450197.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/hinduism_rituals.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/walt_disney_world_transportation_map.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_off00004719.bin
76cc39dd8279c256b0b6cbaad56666407eeb625c8272c4fc0953b9d235215332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4719 5680 bytes
font_01_sfnt_off00005a30.bin
b1362ed30fa989144b735819f25e70d6c2feff0188ea491f0433f466a8bfe5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 9044 bytes

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