Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69221f45cbd555d…

MALICIOUS

PDF

34.1 KB Created: 2020-09-01 18:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbd887402f34cf7fbc00dd581016e86 SHA-1: 975024e774758a9af7f88e33fd4e7dc343c975f4 SHA-256: c69221f45cbd555d9fa7d9f7a72075942b13be677f7e65f3593a68b121eff328
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/pify?keyword=bologna+process+implementation+report+2018'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 'https://static.usrfiles.com/ugd/97aff7_81c0a43a5982466ca0b5dfbeb111d5d2.pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests the document is designed to lure users to malicious infrastructure.

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.link/pify?keyword=bologna+process+implementation+report+2018
    • https://static.usrfiles.com/ugd/97aff7_81c0a43a5982466ca0b5dfbeb111d5d2.pdf
    • https://static.usrfiles.com/ugd/12745a_14c861a8774c485bad348f584f3dba9a.pdf
    • https://static.usrfiles.com/ugd/c345b0_0c577fa465de4f1c9c2af06d58b3ddba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a76236dc6014450881049cea60c599ec.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_1ab3a647097a4bbb88ede2c6f99d0e3a.pdf
    • https://static.usrfiles.com/ugd/ff2e72_57cb3841839b481895b222bf7792b069.pdf
    • https://static.usrfiles.com/ugd/8b9728_f42ceef970e24584b44790d1bc5b8e24.pdf
    • https://static.usrfiles.com/ugd/3826db_32abaf48ded64466937297ddc5201b04.pdf
    • https://static.usrfiles.com/ugd/429b25_a942bd30b1654e92acc8bd862a980aca.pdf
    • https://static.usrfiles.com/ugd/7f929b_0fb7e27d444a422fb8f478182a2f26ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fef6998794846d1a3f7112cc3b3cd04.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_off000046cf.bin
31e1e8172689a9219e04b3bb83261aa659361e99d92dd7350a5b4bf6e15d8106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46CF 5824 bytes
font_01_sfnt_off00005a8f.bin
afdbdda39649c2efeb1e08992b1552d8cd2f0f06dffb1566e05a6b11b800b382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8F 9812 bytes

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