Malicious PDF — malware analysis report

Static analysis result for SHA-256 9096b5675c3ea338…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 04:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb18d3d062d86471571434361e6c0352 SHA-1: 4bb027171d85ac330f56c1084f40c81a34fa1852 SHA-256: 9096b5675c3ea338ed8128aabda9406c3db428c8252a7295c483557fef4c9a8a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or to distribute malicious content. One of the embedded URLs, https://ttraff.cc/wix?keyword=hoyos+louis+sachar+pdf, is flagged as a known malicious redirector. The presence of this malicious link, combined with the heuristic firing for PDF_SEO_LINK_FARM, indicates a likely attempt to lure users to a harmful destination. No scripts were extracted from this sample.

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/wix?keyword=hoyos+louis+sachar+pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/lejijof.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/risk_management_plan_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/porsche_design_pens_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/lamijoduruzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/atlanta_united_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/66740019559.pdf
    • https://static.usrfiles.com/ugd/89064d_1d6a86bb4e8a4a5db5d460575e2711cf.pdf
    • https://static.usrfiles.com/ugd/aff7ca_c785abcf6be541a787ec545faa943587.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5dee72b39b8427087733b168de09a7f.pdf
    • https://static.usrfiles.com/ugd/917232_e2cc136683ca4644b174abca04e29af0.pdf
    • https://static.usrfiles.com/ugd/fb83f1_eac34f6eb3ce411591da5b1840d043a8.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/bramall_lane_away_fans_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/mathematical_definition.pdf
    • https://cdn.shopify.com/s/files/1/0449/4488/3880/files/24186127744.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_off00005759.bin
10a8cb7d5ceccde613d4998dd3418735b1cb4da5fa9d037b31fce913e7f8c58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5759 5308 bytes
font_01_sfnt_off00006961.bin
6e28be2eb2ce79c2301a82b8c095e4198051561037654400899165e5eb1f24ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 11032 bytes

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