Malicious PDF — malware analysis report

Static analysis result for SHA-256 1571316c0be6a19d…

MALICIOUS

PDF

67.6 KB Created: 2020-08-30 03:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 080525c663adbc57717c306df1b0808b SHA-1: 8feb76b8a8d65816ae8b38f2f081ce550889973e SHA-256: 1571316c0be6a19daa567ec4de7af6a62f61355a903e6e86b94a55747c272232
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, directing users to external sites. One of these links, 'https://ttraff.com/wix?keyword=tandberg+audio+science+how+does+it+work', is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=tandberg+audio+science+how+does+it+work
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7ec8654f047b474196717cf639bc79e3.pdf
    • https://static.usrfiles.com/ugd/d99ef3_bba24896d9c64a188032a3488a68b6c3.pdf
    • https://static.usrfiles.com/ugd/a86d68_8cd45df800a44e77959deec767b9182d.pdf
    • https://static.usrfiles.com/ugd/238140_ae25ce41b7794f029666291adfffe860.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb9be28f7c82494aaca9c936f5d3cb08.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b57079a03574ee384b79c52a839f77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e793c5d1ce4c4a4885eb53c11826fe8e.pdf
    • https://static.usrfiles.com/ugd/12f4eb_f09d220211084e128ec1c6f809dbf903.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8ed2b1abe54ebb89ad6e7405b5138e.pdf
    • https://static.usrfiles.com/ugd/5926b4_f0b4f207cfba457e83dab81041b4f8ed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/12167651785.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/98856997487.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/11th_computer_application_answer_key_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/sportsmans_guide_visa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/wondershare_video_converter_ultimate_torrent.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca5c.bin
635eb52a7a00a75256c02d92e73390b3bdd8baed3cc6f8d448c83bb5c0bd112f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 5416 bytes
font_01_sfnt_off0000dcce.bin
4b048a7929b26a18e074d03d3561a2d7bc52f672e45e8c02a6d7901dfe268b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 10704 bytes