Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2cf89087f4d6b3…

MALICIOUS

PDF

41.5 KB Created: 2020-09-02 08:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6334388990438b6d393de10856375820 SHA-1: 505a8c2bab0184d756dfe64815b1960576d8d60b SHA-256: fc2cf89087f4d6b37a843228fe4af5f2f0065f8a2c32c78cf22a9e2aa1cc44ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content or phishing pages.

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+and+apple+meme
    • https://static.usrfiles.com/ugd/7603ae_3562639392924254a0f3bffc408aca53.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc737180331145ea8243538ab859839e.pdf
    • https://static.usrfiles.com/ugd/9ec29b_90aed5dc07114e84a237484acbb8955a.pdf
    • https://static.usrfiles.com/ugd/63022f_265d14cf657a4d2e91581ec1fdde1826.pdf
    • https://static.usrfiles.com/ugd/3ce946_cdc846c6889945608bc1a4d3b620d628.pdf
    • https://static.usrfiles.com/ugd/314c35_df30ece576114aecb84e60e80898ecff.pdf
    • https://static.usrfiles.com/ugd/89363e_387e298b798344b99f22c9eddc4f3170.pdf
    • https://static.usrfiles.com/ugd/824332_e4288b3f7e99462f977c5c8fc5659a26.pdf
    • https://static.usrfiles.com/ugd/02beb7_55f658556335425f8946dadeb227ed57.pdf
    • https://static.usrfiles.com/ugd/6f53d7_3d4500951c164dddb5e10dce36326a0d.pdf
    • https://static.usrfiles.com/ugd/ca32a8_0bed0b5e8dbe44ae8fb989f773601b8e.pdf
    • https://static.usrfiles.com/ugd/105a8c_81aff77d780749048d513c6d0c4884a4.pdf
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/fixufalebuwegexegudurugug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/picsart_old_version_5._33._3_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1694/4807/files/suberorimewozib.pdf
    • https://cdn.shopify.com/s/files/1/0451/9126/6455/files/g935fd_combination_file_free.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_off00006506.bin
9780f19df5ca740ea46d3a94d075d8b9d956a902e7efc06168e3f8f42629801e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 4916 bytes
font_01_sfnt_off000075a5.bin
542c7ca33c691a24f1a5625967a385b3e67e7a38a9ae7974d673b9256ce2c48d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 10476 bytes

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