Malicious PDF — malware analysis report

Static analysis result for SHA-256 26802d2d5736c6a4…

MALICIOUS

PDF

50.2 KB Created: 2020-08-08 01:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e860ed9ebb7bf073240f05189d822e4 SHA-1: 0c8526892b19c40f671221fed50a8c71ea1d5b92 SHA-256: 26802d2d5736c6a4bf4293d841d2b6b832ed8c86e88b6e3b9dd7cbcd52ed4b99
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external PDF links are embedded, likely for SEO manipulation or to host further malicious content. The primary IOC is the malicious redirector URL found in the document.

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/wb?keyword=punca%20keganasan%20rumah%20tangga%20pdf
    • http://files.chesapeakecare.org/uploads/1/3/1/3/131379246/8dd7d30ec4e9.pdf
    • http://files.wanderwithsari.com/uploads/1/3/1/4/131407918/b3dc7f64eddc983.pdf
    • http://pijubukiw.serenitybirth.com/uploads/1/3/2/6/132681504/4797011.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/dorani.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/5029887477.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9767/files/17069220775.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/museo_nacional_de_historia_castillo_de_chapultepec.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/gefowavuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/83360411812.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/pavepepoduwoneze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/jupixagefurejasedegekap.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/gadepasuwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/75361340432.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.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_off00006b5f.bin
eddfeb1bcf8d21595cf4316dec01caf6fb7f5f5a3ccede3dc35a242d3f033f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 5600 bytes
font_01_sfnt_off00007e47.bin
2730adc0a71ba2f956904fe05d25c7e335b01aac63382e012384ef4389f6bfd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 14900 bytes
font_02_sfnt_off0000adac.bin
b4800b50660ed4d35fda90f79891a42d2477bca5d0aa99322b97501d9bd018e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADAC 3616 bytes

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