Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f5d5f678ba19c2…

MALICIOUS

PDF

40.7 KB Created: 2020-09-18 04:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf15bcbe02c590f303fae983482bf56e SHA-1: 493c30154bab1ad6748b4623a9fcdf66f7a402b9 SHA-256: e4f5d5f678ba19c2a044253a00b7c3dcdc9043604c6adb90eddcb5135c8fc1fc
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, designed to direct users to external sites. One of these links, https://ttraff.link/wix?keyword=paper+tower+with+one+sheet+of+paper, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious redirection attempt.

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=paper+tower+with+one+sheet+of+paper
    • http://fovedazi.nauticalreplicas.com.au/uploads/1/3/1/0/131070847/7916862.pdf
    • https://c41fed5a-1fcd-46a1-95dc-0233b770236c.filesusr.com/ugd/370b54_22cac0b84b884dd79ad619b31e9a1767.pdf?index=true
    • https://99b76f9e-7621-44a2-8e2b-99a599380b57.filesusr.com/ugd/98e2de_f6e90442c00f408abc0455f5ca9fc40c.pdf?index=true
    • https://b100b13b-cc2b-4f4d-bd60-d15c8ee4f63e.filesusr.com/ugd/f9fac6_a92c82373e3441e2a478b4035af3a8fc.pdf?index=true
    • https://7f615a2d-6254-447e-9533-5991e6c596db.filesusr.com/ugd/8c7d07_80f3a3406abd4eb08e176198bca9890c.pdf?index=true
    • https://2ae8172b-f03c-4e3c-8772-e3fa7f9f551c.filesusr.com/ugd/ea2f88_65bd866c83704023971ea55cd8e61ff0.pdf?index=true
    • https://a6da439b-10aa-4572-afbd-1d1cb71d7346.filesusr.com/ugd/bb3bf9_f0e4c97af0874dc39e9cf3af3a37b361.pdf?index=true
    • https://466a5d54-15d3-49b4-a064-a9c9a68ad399.filesusr.com/ugd/decf6f_39c776ddb1af42459651cd0e44900a07.pdf?index=true
    • https://a93f7a8a-fdf0-4c34-ba14-b0cdfc3dc5c6.filesusr.com/ugd/21a131_56768f74b4f2421cb08a73c7904e6470.pdf?index=true
    • https://58a4e713-4738-4ff3-866f-33799b34c3f8.filesusr.com/ugd/ecd213_f2b7cc3615b9484d972b7ca2be7ad583.pdf?index=true
    • https://59f10627-5b70-4e88-919f-57afa9a126fb.filesusr.com/ugd/97634b_dd49f525494248059d6108c02dc07c36.pdf?index=true
    • https://91bee9be-2056-4ab6-b2c7-0b9de5b5ca01.filesusr.com/ugd/8c7d07_4ba5cdb9a2cf416fbad0ba7e554bbb4b.pdf?index=true
    • https://22b90090-d432-4119-a94f-2a2ac9fd30a8.filesusr.com/ugd/565485_b7058463b5b04c45b6b58d79b1f4ea5e.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006277.bin
04d78aac0cecba0360d96ff26d0c03dfa4c374e91b3ca7cd99be4eba4d17deac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5048 bytes
font_01_sfnt_off000073b0.bin
c034c1eb1b612310be08f443f3025a25ae41f3c1924cdbd69f3f85ffe95141fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B0 10044 bytes