Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca24ae71f81b71c…

MALICIOUS

PDF

48.7 KB Created: 2020-08-16 16:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9add73e8e3eb2a504d20c564feb34dc5 SHA-1: 00e6226c7579b0d408bec8feb5e5ab381a10e302 SHA-256: 3ca24ae71f81b71c159440c2d9b78a470a07fd79f3a21755af2ae586ca3ffd94
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm and a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=enfold+avia+template+builder, which likely serves to obscure the ultimate destination of the attack. The document body itself is heavily obfuscated and contains references to the redirector URL and numerous other PDF links, reinforcing the link farm and redirection attack pattern.

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=enfold+avia+template+builder
    • http://files.scarboroughukes.com/uploads/1/3/0/7/130738850/2ad4c4a02b51c7.pdf
    • http://files.mom2momsalesmichigan.com/uploads/1/3/1/4/131406082/siwobuz.pdf
    • http://files.bigislandeventrentals.com/uploads/1/3/0/8/130814258/2236c2de5262.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/firurilolizesobajexar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9847/files/jamon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/totirusejopodinidiza.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/among_the_sleep_apk_full.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/9761202185.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7591/files/padurenevanitogasokuxole.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/texas_car_title_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/nolukexirapesajonotamuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/92901582836.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/zelda_ocarina_songbook_12_hole.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/53083666648.pdf
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/98152780853.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_off000078c3.bin
cff0ddbcc98734f1791b20fb03e3cc701d52352f149b0654d6a7c2ad4f9f599c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 5164 bytes
font_01_sfnt_off00008a49.bin
10beee890b17cfc3fc6587c0d16b2d26e16458670349f75b46be8fc414dd9ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 14020 bytes

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