Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa0833d0564a642…

MALICIOUS

PDF

45.1 KB Created: 2020-08-03 12:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bad16dc3c55987812d61dfa3ca05f97 SHA-1: f01591e7f6106b238795e8c9b104638f6843e150 SHA-256: afa0833d0564a6422536056eaa2e0ce97fbe4198ecc65d382e437e402aeabc9f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link redirects to a known malicious infrastructure at ttraff.cc. The document body, though heavily obfuscated, contains the same Vietnamese phrase as the malicious URL's keyword parameter, suggesting a lure. The primary attack vector is likely social engineering via a link farm within the PDF, directing users to malicious content.

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=b%25E1%25BA%25A7u+tr%25E1%25BB%259Di+trong+qu%25E1%25BA%25A3+tr%25E1%25BB%25A9ng+pdf
    • http://files.dkgalaska.org/uploads/1/3/1/4/131452922/kudinarepukivapikozi.pdf
    • http://files.pipart.com.au/uploads/1/3/1/3/131379296/tupowobowunegaw.pdf
    • http://files.kyoeiuni.com/uploads/1/3/1/1/131163867/4081199.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/12075373560.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/8599550412.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/gotimemabiremusafobalivew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/logistic_regression_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/62707656833.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/58603352790.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/zisedanixubenexiwujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5549/files/92394572210.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/buxobosolapuwoxodag.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/tusijutodon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/74041892985.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/94362077543.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/gawaxepufinororedi.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_off00006356.bin
4c7f724f8109f5b9596ab86d1deabae82352309c0099ad00482dd60af756fc62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 5812 bytes
font_01_sfnt_off00007676.bin
14e6beb736d2b9df903848b3ee0b49fa35f37aabf6d28e61d8e8910c462041e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 21804 bytes

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