Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a586adcf25c836…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 15:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57fb482b3094e5707158c706f2b7308 SHA-1: 9d0bfb56c58050f057fb08c3661f118671c02fb5 SHA-256: d6a586adcf25c836dfa6bd3b9c225514aaaec2e8dce0eed5a6153ec6eaa1f93f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=backwards+design+template', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=backwards+design+template
    • http://zunakeje.katieishdesigns.com/uploads/1/3/0/9/130969060/9576280.pdf
    • http://files.johnpiconemusic.com/uploads/1/3/1/8/131856446/romal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6837/files/avadhuta_gita_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/nipepemikumazatemogorafaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/ragevugolefinasejaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/0129/6534/files/nujuvomiwepopoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/vizenexizuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/mewugazimapetekoxemilad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/83489861707.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/clear_bell_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/rejene.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/raxadopadikozopoxetopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/97155594560.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/bimasonagu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/808900304.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/jivesevokokemul.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_off0000680c.bin
57bc6bf329741c121e116b6deea9987282c92b6ad6d668c5ae3f09214ada50b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 5596 bytes
font_01_sfnt_off00007b20.bin
0eeb44abdf6050d47c8369073d7fd8192010571982da91453fa613809cca2cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 10320 bytes

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