Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d52f388f340f15c…

MALICIOUS

PDF

48.0 KB Created: 2020-09-21 23:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0361afc49d1aadb0afa15a87b8176122 SHA-1: d866128485373b40c394cd8c948ad9a589192e7b SHA-256: 8d52f388f340f15c25fc1245f735d4ab9b0788c86776eb610eb7844eed6e8af6
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF documents, suggesting a link farm or redirection strategy. One prominent link, 'https://ttraff.ru/wb?keyword=super%20gangster%20bros%20download', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in directing users to potentially malicious content. The ML classifier also flagged this PDF with high confidence.

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/wb?keyword=super%20gangster%20bros%20download
    • https://52cdc933-0aef-4582-b892-522ee65c5a90.filesusr.com/ugd/bb05c1_c2d91a33c17a465e8cea8d40887f8dc8.pdf?index=true
    • https://ebc585a3-1406-4a3d-81e6-237c72129595.filesusr.com/ugd/ade4e6_61b731ec0694427fb9745cc842c10076.pdf?index=true
    • https://2456b1be-dd84-4452-9ff0-a975ef336e2f.filesusr.com/ugd/83f04e_5ecdeabfe0e94550944eeefaa5952ff9.pdf?index=true
    • https://1ed428b8-c3d1-4599-b36f-877b2a0808a7.filesusr.com/ugd/6c313a_d45e443f26c44e57a03425adfed20817.pdf?index=true
    • https://62e8ee33-675a-4636-bfc6-db9560d25bb6.filesusr.com/ugd/906e9f_6fbefce990264577874375c64be8131d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/on_call_firefighter_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/27796107628.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/strength_of_materials_book_by_khurmi_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/86477185875.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/liwenel.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/cooling_tower_download.pdf
    • https://861cc875-3752-48eb-9db4-fd2b8c567ce4.filesusr.com/ugd/76156b_5ea3f09cc7d54dd590f9d80693373507.pdf?index=true
    • https://2304bc3e-d6cf-457b-b28c-30bd63707aee.filesusr.com/ugd/197ed4_ede4863ad0174b298212337c99b735dc.pdf?index=true
    • https://bd760ac8-4712-437c-8d46-32d515c01b77.filesusr.com/ugd/9df9d6_79fad1ae40044451a9c56ed3896ee0b8.pdf?index=true
    • https://39649c3d-fe45-4f60-918f-e030aad43b57.filesusr.com/ugd/ceb2e8_1b802d8fab2146cf927942ed7711ce97.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d0.bin
2682e797eb470bfff2626340c778d0a6c2a938f2858aaa4f0ac69fc7b48de702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 5460 bytes
font_01_sfnt_off00007978.bin
e8694c442f737cedec2bf3f334437c2e053411ea351ad7e474ec9873d4d25e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7978 10296 bytes
font_02_sfnt_off00009cff.bin
684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFF 16376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.