Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ca27ef86ab0332…

MALICIOUS

PDF

38.7 KB Created: 2020-07-09 05:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68db4f97e3b1ae1881fb7d4c9ebc27d4 SHA-1: 023a6ddc342157dceb5ac29ad65c0c3c02790876 SHA-256: b3ca27ef86ab0332dcea2c36b372ab88e1cd260262272aa4ba9c9ddd2290a493
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as a manual for a 'Sienta 2016'. Analysis reveals a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/wb?keyword=sienta%202016%20manual'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. The document body contains text related to the lure and embedded URLs.

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.ru/wb?keyword=sienta%202016%20manual
    • http://files.revivalcultivation.com/uploads/1/3/1/8/131856770/mokozusatisox.pdf
    • http://files.leavesbyjenney.com/uploads/1/3/0/9/130969514/99443c.pdf
    • http://files.imagegroup.org.uk/uploads/1/3/0/8/130813885/416e62adf.pdf
    • http://files.yogabydaniellesmith.com/uploads/1/3/0/9/130969907/rigawunapora_jexasuk_dimerivil.pdf
    • http://files.susanlegrow.com/uploads/1/3/2/7/132741064/45dd309bdb7.pdf
    • http://files.ldpittsburghphoto.com/uploads/1/3/2/3/132303151/dixujomawuvokuvufi.pdf
    • https://nixelebev.files.wordpress.com/2020/06/tabevejufu.pdf
    • https://xomuxemilud.files.wordpress.com/2020/06/53401942895.pdf
    • https://dexugosaduj.files.wordpress.com/2020/06/vasenojobukibeno.pdf
    • https://fiwojinugir.files.wordpress.com/2020/06/40497214650.pdf
    • https://nozofabobeve.files.wordpress.com/2020/06/4602829705.pdf
    • https://mobulozasa.files.wordpress.com/2020/06/rajoxezogufajedaxibefa.pdf
    • https://welibawone.files.wordpress.com/2020/06/14648048167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.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_off00005aed.bin
33209001b7f4d61f40850abe7e10e93e55de100da91bb5553561b0d358e89794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AED 4912 bytes
font_01_sfnt_off00006b84.bin
db059d5485bc5df7ccfb5d20d9f8194c222fa58dada04404ae6919299dae8138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 10216 bytes

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