Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baf825240927e8f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-29 15:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a507e050b8f34d7e819bef51e2cdb0ff SHA-1: 525f4876861e0d6058329ac61f8921c2b2244ec9 SHA-256: 1baf825240927e8f69a8f57ffe9da05937ca1bcb4aa1d5fd1df5654b26f08a8a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.cc/wix?keyword=gisti+circulaire+valls', is identified as a malicious redirector. The presence of numerous links, including the malicious one, suggests an attempt to lure users to potentially harmful websites, likely for phishing or malware distribution.

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/wix?keyword=gisti+circulaire+valls
    • https://cdn.shopify.com/s/files/1/0433/0310/8768/files/american_sign_language_alphabet_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/40073241053.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/dotogavobe.pdf
    • https://cdn.shopify.com/s/files/1/0457/3619/8300/files/reludetuvaxaxibizuze.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/feposatupuvowutut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://static.usrfiles.com/ugd/b8c837_022441e0a6994c79b7f1fd4cfe042bb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb856a9c6ec4f37b96d4757c6fd5147.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/88262825384.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/bozededukomowogememorejon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/sevafexubo.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_off00005f60.bin
a9922c9fa56f2370a91b7bbf549dd2cad84bba0f50933324436fa786128337ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 4884 bytes
font_01_sfnt_off00007016.bin
05664df3715d944ae2e6f816804d4e6f327012954038296d1aa861765443d7ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 11984 bytes

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