Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f3b9947f330657…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 15:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718a1de55bf7fce6c8d40f5b8029d8b1 SHA-1: 13fe1d666fe2a7a9c988f107220c0eb353e451c5 SHA-256: 39f3b9947f3306577949a6f92ce0cf3f99321b3d1da2eb43db45297051304614
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used in SEO poisoning or link farm attacks. One of these links, 'https://ttraff.ru/wix?keyword=burj+khalifa+video+song', is flagged as a malicious redirector. The document body contains garbled text along with several URLs, reinforcing the link-based attack vector. No scripts were extracted from this sample.

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=burj+khalifa+video+song
    • https://static.usrfiles.com/ugd/b8c837_7257fe6e0ff84f8d828c00303559191e.pdf
    • https://static.usrfiles.com/ugd/5be868_e72b07a3435d4fe291f85e3796a36ed1.pdf
    • https://static.usrfiles.com/ugd/b27199_c596bfae94b14f1c93387baf2f92ddf7.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/36263840362.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/xasati.pdf
    • https://cdn.shopify.com/s/files/1/0463/0819/6517/files/pediduxapuvimajatagibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/74174438854.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/41706824760.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/como_baixar_passei_direto.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/badunajemojasuganezulok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/54537783777.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/76902303781.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/kumipapujovalegapod.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/ezgo_marathon_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/business_plan_introduction_sample.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_off00004655.bin
165883cb906cf732998db2d178c97dd73c9c58ad8048389eb2f51cd1759407a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4655 5416 bytes
font_01_sfnt_off000058d1.bin
2a8ddb3fa889dc42eae23fbb242f06d92eda3f80005f07a8d59b66336933cc22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D1 9712 bytes

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