Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d906a3fc3b93bdb…

MALICIOUS

PDF

45.9 KB Created: 2020-09-02 02:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af6cce07b993815a37075f82141d6289 SHA-1: 9ee7e8fa50189b5259965ae77c096bb1b2bcb4d8 SHA-256: 8d906a3fc3b93bdbbbdd8e7bab352ea86de55d78b879ed72ccfd1458e35cb865
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm designed to distribute malicious content. The primary malicious URL identified is `https://ttraff.cc/wix?keyword=free+feedback+form+template+html`. No scripts were extracted, and the document body contained mostly garbled text and URLs.

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/wix?keyword=free+feedback+form+template+html
    • https://static.usrfiles.com/ugd/5c9621_61c69aa1230b4023b5548e8e1de033e7.pdf
    • https://static.usrfiles.com/ugd/143c98_4f05bc23181b497f954f1f70747f3ce9.pdf
    • https://static.usrfiles.com/ugd/a382ee_fa8dfebf13d54eec8177da33259fa5f2.pdf
    • https://static.usrfiles.com/ugd/f3cb45_b32bafa8f97049faaa0069f8881f5c3b.pdf
    • https://static.usrfiles.com/ugd/a48928_69b0020192ce4a1c9da4be347c69c0c2.pdf
    • https://static.usrfiles.com/ugd/b56239_b7d579d6921e4a56b9e8789f951326d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_99fe961d527c40e48348b34a240f6a04.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/85779292792.pdf
    • https://cdn.shopify.com/s/files/1/0465/5372/7126/files/jininiwanupo.pdf
    • https://cdn.shopify.com/s/files/1/0466/6959/4789/files/wisupigifena.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/85739142216.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/livufin.pdf
    • https://cdn.shopify.com/s/files/1/0436/2695/4905/files/headway_elementary_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/23036274340.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_off00007577.bin
9ecec56d89da9686b2c0a905a684ae750b895364c508b0f64de9e4e245d7fdfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 5376 bytes
font_01_sfnt_off0000879b.bin
8e874015f273d5cbe8e97f34ef2e59507c7804139a894535068d39a5c43bdf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 10448 bytes

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