Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d4cc2a377249f1…

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 11:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a25f775520067973567d25004e83d825 SHA-1: 1509e9ead954d08e359070aedf0c0a66ba44a153 SHA-256: b5d4cc2a377249f1c8ad6c1dd35fd8a68a3517b259a3c00cd9c8dbd5a6a05e89
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/wix?keyword=astm+c470+pdf', suggesting a lure related to ASTM C470 standards. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious site.

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.com/wix?keyword=astm+c470+pdf
    • https://static.usrfiles.com/ugd/8dde66_93ad5a2fb59a48bbb1c922da6408f686.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e9a70d53dca94d19b4260a2070d1abe3.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_c96c0114ffe34891bfc0082da9f756a9.pdf
    • https://static.usrfiles.com/ugd/03ae60_0114e684cda243848b6da0e0c9aeb144.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f476750cf7845febaeef278ee60f847.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/73558917406.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/55943078671.pdf
    • https://cdn.shopify.com/s/files/1/0450/1897/2318/files/sumijelevavibifeluduto.pdf
    • https://static.usrfiles.com/ugd/30e015_b928c410bd924623bd832669594cbd95.pdf
    • https://static.usrfiles.com/ugd/362633_a725f60046884080b65227f9b1909ebe.pdf
    • https://static.usrfiles.com/ugd/529dbf_0a1b054580eb478a97a0d3965cc4b009.pdf
    • https://static.usrfiles.com/ugd/906e9f_61bbe67c19ec43c5b1addf76a6a099d2.pdf
    • https://static.usrfiles.com/ugd/72b0e7_78a35437e6654de9970f7642722170c8.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_off00005327.bin
f9fc7ece6c294fbd137a7f4bc658555121bb686b962284f90d2c6ebf9faa5ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5327 5260 bytes
font_01_sfnt_off0000650e.bin
8f354e263332ef8d1db2f740c60570d422ad39f9482564e59a4c6d55e011bae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 9548 bytes

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