Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48b968279f766d9…

MALICIOUS

PDF

44.2 KB Created: 2020-07-31 15:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53b593a8582d1c9b6e7d5d60f8ec7087 SHA-1: 8e0b4d487871ed52dc6481801072bfe941c1dbe2 SHA-256: c48b968279f766d934dd3ff34b0259fc7f97b0b45890d3a6443512752a064342
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits a PDF link farm heuristic, with 17 external PDF links, many hosted on cdn.shopify.com. The document body contains metadata related to 'Ankylose definition pdf' and the wkhtmltopdf application, suggesting a lure document. The primary attack pattern involves redirecting users to potentially malicious content via these embedded links.

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/pify?keyword=ankylose+definition+pdf
    • http://files.ohioedtech.com/uploads/1/3/1/3/131379716/kiluzuxenobu_xakizemu.pdf
    • http://files.vukvukovic.org/uploads/1/3/0/7/130775116/banilevi_sijuvod.pdf
    • http://files.store.wabashfriendscounseling.com/uploads/1/3/0/9/130969966/kegaremu-mazew.pdf
    • http://files.lakeshorecenteratokoboji.org/uploads/1/3/1/1/131163683/8525124.pdf
    • http://files.cacmun41.org/uploads/1/3/1/4/131406337/kusit-lamapufusura-dunarufojibod.pdf
    • http://files.lakeshorecenteratokoboji.org/uploads/1/3/1/1/131163
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/kewonanalumibivemoraxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/pukotiril.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/levaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/golezukumunotukabipeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/17487411611.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/zefapaximonogazogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/fuzonupokuwezisuxasis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/taviberasepovoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/83755539335.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/88930889447.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/78517252190.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_off00006c53.bin
26f602e010885f269c826e73c6ee3cca2e27a47093eb9e5349053df870f7b537
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 4672 bytes
font_01_sfnt_off00007c56.bin
f21278ab145ee4e4bdf6aa019773f5255bfe19d399dfa023b8a112fc7b8003a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 12084 bytes