Malicious PDF — malware analysis report

Static analysis result for SHA-256 529271dba268a0d1…

MALICIOUS

PDF

44.1 KB Created: 2020-08-09 18:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d9e8de9f027ac8c6a9e21d93e5b779 SHA-1: e28701e2bc1c548fcb08280d28a1b7ef38a9a5fc SHA-256: 529271dba268a0d111c7666d197e9c5ef9816e7215f4fdee84a63a8af836aafe
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or exploits.

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=descriptive+research+design+definition+by+authors+2020+pdf
    • http://files.philipestrada.org/uploads/1/3/1/4/131406448/judofa_wokelow.pdf
    • http://files.rbcdublin.org/uploads/1/3/1/1/131164063/2863635.pdf
    • http://files.pa-di.dk/uploads/1/3/1/4/131407135/6371781.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/convert_excel_to_csv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/nimavisefekinarekuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/wagawelevulizajon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/group_dynamics_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3593/files/sepse_neonatal_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/how_to_run_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/35589842154.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/9625053477.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/12993023281.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/99956450659.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/sukix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.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_off00006b3f.bin
4a11c38def454add92f0e6dc82eee7386ae3e367a01b0113b5156b7ee4febdb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3F 5960 bytes
font_01_sfnt_off00007f98.bin
01c065f4caf5fa1796ebd035874fafa1a90a9b90e091f12f31be8a14cfd8369e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10488 bytes

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