Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d021bd94670aae1…

MALICIOUS

PDF

39.2 KB Created: 2020-09-01 05:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef50169e6458f1b1f14d339a609b442 SHA-1: 32b71065c77fc3a7aa562ac6e5aeb11fb6ac29b9 SHA-256: 8d021bd94670aae108a86f06742be04e9b74131dfb6f3b9738251cd67736b027
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of embedded links, characteristic of a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=android+phone+mockup+vector, which likely serves as a gateway to further malicious content. The document body appears to be corrupted or heavily obfuscated, but the presence of URLs and the heuristic firings strongly indicate a malicious redirection attempt.

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.ru/wix?keyword=android+phone+mockup+vector
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/26515411665.pdf
    • https://cdn.shopify.com/s/files/1/0443/8881/0918/files/a_keyholder_s_handbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/pokewawowijiwelovirati.pdf
    • https://static.usrfiles.com/ugd/34e21e_80375e1ee41c40d4862be8eb6dbf3bb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_3107dfe9b730412ba74a3e62a761ee0c.pdf
    • https://static.usrfiles.com/ugd/ad2ade_e945cf7202554a208dbe4b7f3a2183bd.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_1e5dd40190d24d01b32463e59f09992f.pdf
    • https://static.usrfiles.com/ugd/b8c837_356b15b450b24591b0eb03bcefb11b74.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdacf10884604719b5fe5f97e6c3203c.pdf
    • https://static.usrfiles.com/ugd/6f7357_0f913b46651d47fdafe2726ac69e2dcc.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_off00005b13.bin
b9f7de6f13dcc68cb6f8ac99733637b8e2c190222146fd443e875f86f9a94b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B13 5008 bytes
font_01_sfnt_off00006bf6.bin
022c32232aa35dcead410e13eb46df65aa8763f7835628d415e9100ee3320ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 10664 bytes

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