Malicious PDF — malware analysis report

Static analysis result for SHA-256 e031581ae1e3982f…

MALICIOUS

PDF

44.1 KB Created: 2020-09-22 00:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51f032e94f5d441df3353c2822a38e5 SHA-1: d579d80bd3ed928a19a8d441cef65d5f480291c9 SHA-256: e031581ae1e3982f842866d6a2434b194d10206a5a3ace7590c3ad3a8700e707
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL related to 'flint river council camp cards'. Additionally, the PDF exhibits characteristics of a link farm, containing numerous external links, many of which point to unknown domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a malicious link embedded within the document.

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/wix?keyword=flint+river+council+camp+cards
    • http://fivufusum.mathkanection.com/uploads/1/3/0/7/130739353/kixaxepukugizase.pdf
    • http://novima.ghqg.org/uploads/1/3/1/8/131856222/4727252.pdf
    • http://files.rodmanplantation.com/uploads/1/3/1/6/131606563/5ed10910152152.pdf
    • http://files.giaddiecreations.com/uploads/1/3/2/7/132740637/798466dd55e.pdf
    • http://zulowolik.dancingravenstoneworks.com/uploads/1/3/1/4/131482952/40a731be2b9b3.pdf
    • https://e39b630d-bbb3-43e3-a61c-2207dabd7a8c.filesusr.com/ugd/49488e_6d434b735deb4df88487a0b07f7a88b9.pdf?index=true
    • https://ac7e4d20-8b9b-4d4e-a9da-05d70fd3d11f.filesusr.com/ugd/c1615c_39fb01984379481880a04ad2365412f0.pdf?index=true
    • https://d7e203b7-c25f-45d2-96a2-ea2acb17fb3b.filesusr.com/ugd/c4f63d_47006af118454a488cfe31590165c7c5.pdf?index=true
    • https://d2e33184-577e-4ab5-a0b5-88c0dfe3a50b.filesusr.com/ugd/95ea6b_a39b5304f3424cf9b72ae075d9c63da7.pdf?index=true
    • https://69abc2bb-e695-4772-ae0c-898c47a9b775.filesusr.com/ugd/ee6100_0fa615a4662b4e7e9f6bd708e7d4106c.pdf?index=true
    • https://4fdc9b7f-27c1-4f10-9773-aa6a7b3e9af6.filesusr.com/ugd/63d3ad_15849bcd84b7469c83288fb920d1180e.pdf?index=true
    • https://f760f22c-d01e-4031-b34f-d57c5bae1ae3.filesusr.com/ugd/58a813_88429dfa0f2c4ca29381d44337ea97e0.pdf?index=true
    • https://17dd6b2e-369d-43a0-94bc-ad122b82424d.filesusr.com/ugd/07625c_3f0618bd578a47cf9c1f7fdb9e29e815.pdf?index=true
    • https://d4fc203d-bf1d-41f8-a17b-49729ab1c57f.filesusr.com/ugd/bca722_cfb1e68d37524ee68c7b103ca132ef7e.pdf?index=true
    • 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/
    • https://d4fc203d-bf1d-41f8-a17b-49729ab1c57f.filesusr.com/ugd/bca722_cfb1e68

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb0.bin
1c60ae084eeb9384252ba26a28eb82c2f389d9b42e13e759afba8137abd70b35
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB0 5232 bytes
font_01_sfnt_off00007d6c.bin
8d8fbbd4a44708fd56f3d31817f1f26b22a31172f09c013cd367ff3eefde93fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 11252 bytes