Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d8e5864b65f75f…

MALICIOUS

PDF

59.7 KB Created: 2020-08-29 23:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf88935c83eddad718134b95e0efc52b SHA-1: 940527fa78dbf7d627963f0d453062da6e75faec SHA-256: 30d8e5864b65f75fb122ee9a2f7cee32f3ce7513853e48d13701c5917fe04ce2
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'. This URL is embedded within the document body, disguised with a keyword related to 'Chicago Med season 2 episode 22', suggesting a lure to trick users into clicking. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

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=chicago+med+season+2+episode+22
    • https://static.usrfiles.com/ugd/b8c837_4096fe952ff041c2bf31416b9102844a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc9a486b9604967a546ce3f8cd15726.pdf
    • https://static.usrfiles.com/ugd/b8c837_683867d6f6ab4a2c85a21c86e6755aee.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/6441496842.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/18275824948.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/addition_worksheets_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0463/4257/0145/files/intermediate_accounting_kieso_solutions_manual_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed4e5c9e25a441da7a1e67086ae9b1a.pdf
    • https://static.usrfiles.com/ugd/834936_c4520f1ec5f84d71b010bdee50d00ce0.pdf
    • https://static.usrfiles.com/ugd/10b11f_eeca1a117563478696f7971c33d38e03.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ab7b7970844811aeeabe7b5dd323dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e9824299a554abc8e5ff03263e283e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a260537d8644b40bfbab4801e197c7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_998863c5d1334780be8abf5439391b29.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b55a81714a74976b0b84c4e3d273943.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_off0000ac02.bin
34b35755fa5587321fc8a0b54ef97f30d40982087727dd946cd9cde5cb314cfc
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC02 5396 bytes
font_01_sfnt_off0000be3a.bin
248d00bc19c4a7d2b5228abd15e28600524b5a061b1e4ada34d9269f7592fd16
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3A 10416 bytes