Malicious PDF — malware analysis report

Static analysis result for SHA-256 5108b2cb7fc88fcd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-18 14:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b38c63b7e2b099ea29bcf4b2fe3df3 SHA-1: fe9e90c62a675ba10e5dd536b496d798424dcd5d SHA-256: 5108b2cb7fc88fcd92842617745608e3d513bb1bf45b177d36ff00f06b1c7ad4
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same redirector URL and numerous other URLs pointing to PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to deliver a payload or phish for information.

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.cc/pify?keyword=chrome+browser+for+sony+android+tv
    • http://files.innovationsbuildingservices.com/uploads/1/3/0/7/130738501/c7ad0bee378.pdf
    • http://files.scubadivingperhentian.com/uploads/1/3/1/0/131070520/denowiv-dijaw.pdf
    • http://files.ronaldchaseauthor.com/uploads/1/3/0/7/130740367/luxewesazivuzud.pdf
    • http://files.veerahiranandani.com/uploads/1/3/1/0/131070820/6404631.pdf
    • http://tunuw.stratocasterpickguards.com/uploads/1/3/1/0/131071157/4272037.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/getanoxizokara.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/8993/7055/files/boxbox_riven_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/bergey_s_manual_of_determinative_bacteriology_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/fazonamokameluvuwazosure.pdf
    • https://cdn.shopify.com/s/files/1/0435/4677/1607/files/43464539924.pdf
    • https://cdn.shopify.com/s/files/1/0429/5445/7254/files/geleke.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/
    • https://cdn.shopify.com/s/files/1/0433/0163

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ec.bin
648fcca2b6373f8d8c5746d342f98abc3961ea69c887b4be22271d78014b7f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 5320 bytes
font_01_sfnt_off000076f0.bin
b1b7abe516183292985258a93934dccc59c692eecd07d05e87754bedfd9cf84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 10376 bytes
font_02_sfnt_off00009a5f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 4324 bytes

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