Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e979e346e073de…

MALICIOUS

PDF

46.0 KB Created: 2020-08-29 23:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ee284668711c804d6941e65672cc9d SHA-1: 85f3e905e3b11a50460c7fd5f32d96659b73af1e SHA-256: c1e979e346e073de3e1089faaae3ae0bfd4cccb9904ad6c0704721bf6531a073
150 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.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a reference to 'Obs rainbow six siege', suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious destinations.

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.ru/wix?keyword=obs+rainbow+six+siege
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/99012544165.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/81340446220.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/debuvixelaw.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df67ebf33d145a4a7d7626fcc6d1c51.pdf
    • https://cdn.shopify.com/s/files/1/0459/9418/0767/files/space_wallpaper_full_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/laxiloxafuriwejojitagowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8941/9676/files/68483217745.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/anemia_por_dficit_de_cido_flico.pdf
    • https://static.usrfiles.com/ugd/b8c837_09714c9640e64a18a20a9b21644430a9.pdf
    • https://static.usrfiles.com/ugd/a107db_3ed83a094dfd4193a9230ae54d3df408.pdf
    • https://static.usrfiles.com/ugd/06497e_7b9c632e2c8e44aa86e63aa8895deee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfa4bfd4d8014aec97212927136faeb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_04b691418b70453aa3f836a0939145b7.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_off00006b27.bin
e6e206db3bb4e69cad33d254a85ea0c66e74a93aa13da7d375301cffae51b261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 5148 bytes
font_01_sfnt_off00007ccb.bin
7d2170dfbedf46ec65867d3d7bdcb604bb7fdd0cbcdd23197745a4023b547b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCB 14940 bytes

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