Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2f42646fee1294…

MALICIOUS

PDF

96.4 KB Created: 2020-08-30 23:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c185edf4a6694df52e4d8ebac7768e7 SHA-1: ff5e8ce70a0c48eaa8087477d7150a112c790c0a SHA-256: 3b2f42646fee1294835cd4d1a51090b2bc375766ccd83401152f683421a150cd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the PDF is part of a link farm, with the primary URL being a redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=plan+y+programa+de+quinto+grado, which is flagged as malicious. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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=plan+y+programa+de+quinto+grado
    • https://cdn.shopify.com/s/files/1/0434/2261/3669/files/dasavug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/jiguke.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/nintendo_ds_r4_card.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://static.usrfiles.com/ugd/b8c837_c23f1188a5154b8980cb8176da2cb52b.pdf
    • https://static.usrfiles.com/ugd/575363_4ea0d0af69e544bc8a18704d57e21468.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_5af50ebce5bf41469c77f40944353e28.pdf
    • https://static.usrfiles.com/ugd/b8c837_c817e777ffad4352919e13822e8f704a.pdf
    • https://static.usrfiles.com/ugd/b8c837_85d4b6f958204b24b3f2a9278f2e0a7a.pdf
    • https://static.usrfiles.com/ugd/2ddd39_15897064f51f40738e9951a52f223038.pdf
    • https://static.usrfiles.com/ugd/345929_bf9b246ca276449a8cac2b759a8087c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/625844_454bf44dc9254f269f903757c52da959.pdf
    • https://static.usrfiles.com/ugd/5360f8_0125e5bb4aa84034a8efd5d53b0ec39e.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_off00012e6f.bin
8d4cd41456ad998961070ba78d220828d85fcd8a530786c56eea2f979698f757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6F 5328 bytes
font_01_sfnt_off00014075.bin
e1c781bb26d21907e0fe1fe7087758e37180109a241ce70b9b5e6713d6519c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14075 16948 bytes

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