Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73e6b9b274503a1…

MALICIOUS

PDF

41.7 KB Created: 2020-09-18 04:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe3a9634c5bf2da518c348422397e5b SHA-1: dce9c0333cae1de7a6fd7852c90bb866e66b23f7 SHA-256: c73e6b9b274503a1f1f7dd2bc9e86ba2886c055628d5e8eaa7eb5f91760e8f1f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-Override

The PDF contains a large number of embedded links, constituting a link farm designed to redirect users to malicious content. One of the primary redirector URLs identified is https://ttraff.link/wix?keyword=requiem+pdf+lauren. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing numerous external links.

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.link/wix?keyword=requiem+pdf+lauren
    • https://1ffe05e8-1d54-4945-9857-f67696a22dec.filesusr.com/ugd/cb4a18_44c91e29039047d5b6b52c88c45af4cf.pdf?index=true
    • https://99f49d24-a47d-45a4-a828-1ba6217d198c.filesusr.com/ugd/934fc3_7e2d3bf97bed4568ba2d932c230d5f16.pdf?index=true
    • https://b4c4a6bf-da2d-4f1d-9bdf-46295d0095c3.filesusr.com/ugd/9d7ad9_26c8ee42460c44f9ab72a5650fddf578.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/usps_3602-_nz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/u_t_r_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/adding_subtracting_decimals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7345/4748/files/32436266181.pdf
    • https://8d9f95a0-2e1a-4876-a0f7-90beaef62f8e.filesusr.com/ugd/d90490_2150517b9694469abfceb27f45a58f3f.pdf?index=true
    • https://dbbad3d7-5075-4501-bb26-3b5493457a96.filesusr.com/ugd/18f527_ec20d68874224603b333e41ddc4c0d3f.pdf?index=true
    • https://3dedda96-0740-4e5f-927f-2ae4ca1bdf3b.filesusr.com/ugd/9d66c7_0f39c7a55c7a4d2cab064eb3496cc0d1.pdf?index=true
    • https://4ae5a20e-6764-4ec4-8b01-9c7529a94cc3.filesusr.com/ugd/80bfa9_4245df53cec44fad86b53369f6b08c02.pdf?index=true
    • https://5ca7c03d-6f68-46fa-a8c5-8ff3dbce5a66.filesusr.com/ugd/5926b4_cfdea0011ab245e8a46d1073523e8646.pdf?index=true
    • 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_off000066d1.bin
59dbf39d1e6aff12f9c4cb58dd6ac197ff72fedd77096ea6d36fdf16323c8e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 5144 bytes
font_01_sfnt_off0000783b.bin
2a7448deaab496dcd496d7c0e4aedfdba11e69c0084c4cdc9da4708590b59552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 10104 bytes

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