Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a5abc4e2c8f54a…

MALICIOUS

PDF

54.1 KB Created: 2020-08-05 09:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c10709872bde2f893f350525dd209dcb SHA-1: 20a9b3e53690011da3e1890edab74413c352a3f8 SHA-256: 87a5abc4e2c8f54a1e1eab20235e875ce83b99feb073f813a658cd69ec2b6231
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'. The document body, though heavily obfuscated, contains the same URL. This indicates a phishing attempt disguised as educational content to lure users 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/pify?keyword=math+worksheets+5th+grade+pdf
    • http://files.themoseschronicles.com/uploads/1/3/2/6/132682040/297927.pdf
    • http://dodivivi.mermaid-consultants.com/uploads/1/3/1/4/131437987/6538094.pdf
    • http://files.brittanywoolsey.com/uploads/1/3/1/3/131383943/sidaxanitawijid_juwakobe_vezevodedeje_turebuzasedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69865881622.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/sivudatuvobiganu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/sofulatuken.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/22636740290.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/tanilugadadaxuvoluxozufel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/lavasad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/filifelita.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/audible_app_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/23483243187.pdf
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/fesefuzomimofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/88307262990.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000894a.bin
dd0d9db05961b1197fa8633d884ddee1429720c5a12a384900f283ade18b33e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894A 5188 bytes
font_01_sfnt_off00009b1e.bin
4761bf6937aec1901415004d9a4c047f8b68c56ffe7d538737d9b8581f0becaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1E 9976 bytes
font_02_sfnt_off0000bd27.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD27 4324 bytes

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