Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c0fed2e996f05c…

MALICIOUS

PDF

65.8 KB Created: 2020-08-29 02:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9077e154a877ee78bef728914ad7ce0 SHA-1: f709079f946d1ef45339b1e31b2be6ae982b7ced SHA-256: 86c0fed2e996f05cce3b01ed27319995ccbddba1332ce12f6d12c847c7a993e2
150 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 'https://ttraff.cc/wix?keyword=lab+4+plant+pigments+and+photosynthe'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to external malicious content.

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/wix?keyword=lab+4+plant+pigments+and+photosynthe
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/54032844762.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/xupajavozifaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/27834914344.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/drone_visuo_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_0893b9117fc24951aa6f7b0ce4139260.pdf
    • https://static.usrfiles.com/ugd/b8c837_9261417b23ee47ed882b883124e8146f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1467a39025ce4bce8b4f3f68e8e28027.pdf
    • https://static.usrfiles.com/ugd/b8c837_43deaa3efff0478aaac26c00240fc6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7101a2ca2584c46b020b3c9b8338874.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/grandstream_ucm_6208_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://static.usrfiles.com/ugd/b8c837_61aa954e9a2c416e8cf530f4bbf5c2ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9229c7475ac148419475120c0c0259a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a95cb3f7f47444498a6b5c4cf87de379.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b2974345fa840c3ac7713ef66b71387.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_off0000c139.bin
8df87d266520df21d668ba067bcf0c8ddfd8adeb0c55cc3da475758dd27dc02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC139 5548 bytes
font_01_sfnt_off0000d3ef.bin
c757df226fdbd3cf12aae7ea73b9b14a16804f854901f36455697f2c057bf6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 11648 bytes

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