Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f427bc525fd8b26…

MALICIOUS

PDF

39.6 KB Created: 2020-09-02 08:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d1535209df2e4eda81934f1154cd90 SHA-1: 60b1023da641f3339db515bc56c5ce50e08434c1 SHA-256: 9f427bc525fd8b26ad235ee68e64d8401de8f08a22bf8e8700565e36f33ce3af
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious content. The document also contains a mass of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The presence of a 'download button' heuristic further supports the lure mechanism. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=integumentary+system+quiz+with+answers
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/pedov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/27430723366.pdf
    • https://cdn.shopify.com/s/files/1/0438/4138/8709/files/wilokivewagarota.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/58711053963.pdf
    • https://static.usrfiles.com/ugd/6116da_4379245ec0b7479bbc220617552489b9.pdf
    • https://static.usrfiles.com/ugd/34e21e_d78ddbf0e53a43efbab303f398d3eaaa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/13985865228.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/belajar_bahasa_arab_untuk_anak.pdf
    • https://cdn.shopify.com/s/files/1/0440/5778/8568/files/tuzazupobopuwegogofiba.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/piluvuv.pdf
    • https://static.usrfiles.com/ugd/a86d68_d6c6e95322ee44b989ecb9f217e780e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_42b3eb17a62e43d0b5da226daf5f54b5.pdf
    • https://static.usrfiles.com/ugd/913720_ba15fb82131847bcb093a655bc30adc3.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_off00005b19.bin
43883bf3694db50cf82f987f7d39c6808eac68604e572fac2976605e02871871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B19 5376 bytes
font_01_sfnt_off00006d57.bin
fa05e6ed344809496a2287771657dfaf5f413b8f9f5767d1191df51d2f9cb47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 10756 bytes

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