Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d4dfc97461676…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 15:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96f6b1613aae818e528fa3cf4fdcbebe SHA-1: 3079145f8aa5e75787725d22ed63dc19f1152818 SHA-256: b32d4dfc974616760920303885cb97e44c7d7d68d834820250b309dfb30bd1f1
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent, likely serving as a lure to a 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=apache+hadoop+yarn+moving+beyond+map
    • https://static.usrfiles.com/ugd/b8c837_a059dc2c93874853aeb161360491ab81.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a102dd05cd640c09c166b36a8101432.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_6dbbfa06167b4b129b15fc6e9ba8bf22.pdf
    • https://static.usrfiles.com/ugd/b8c837_c064f48203fc4112bd9e96fab972b9f6.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/dugezaxif.pdf
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/bebofinefigovujej.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/webatule.pdf
    • https://static.usrfiles.com/ugd/b8c837_671b921d26fe4d7c95f5255a96613543.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_d1b6ba2232c14ba18cdd3aac44a60ce3.pdf
    • https://static.usrfiles.com/ugd/c068f8_2ae2f52308f5458ba21fd7b0dbbd49ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6b61e60e3f448f8a4c378df59dd932.pdf
    • https://static.usrfiles.com/ugd/91e123_c852696c0cbe4aa8aa10610a6ab58ea2.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_off00006a67.bin
5bd12eae61df980201bf5a1d79157a553d33089411d6cc3f55a59b6b7b2a45cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A67 5568 bytes
font_01_sfnt_off00007d2a.bin
0dfed63a02cf1dbe485a9e8cbc353060dc59a46425b96f8d2ed67c6f1f980603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2A 10444 bytes

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