Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72ff5770a98e326…

MALICIOUS

PDF

38.9 KB Created: 2020-08-28 20:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76cfdc1ae689a7a3443994797dfb1d21 SHA-1: 301d4082617001d29cade112f25e5bf4a66ad18a SHA-256: c72ff5770a98e326cbf62d3efcf397a7c43fc0854a6480bd50cc9e65c67258a6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, likely for SEO manipulation or to obscure malicious destinations. The primary malicious URL identified is https://ttraff.ru/wix?keyword=bioelementos+y+biomoleculas, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the suspicious URL and a benign-looking PDF link.

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=bioelementos+y+biomoleculas
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/gebelulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/dcouper_un_en_plusieurs_parties.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/mobekowofu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/structure_of_fructose_in_cyclic_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8873021ca7949f9a9aab3c01abd3296.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6c68ede7ab4d0985bd823f7434ac85.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cdb6847933b43199d51d19747e5f3ae.pdf
    • https://cdn.shopify.com/s/files/1/0458/1182/6854/files/yamaha_r3_2018_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/appareillage_hager_essensya_pdf.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_off00005891.bin
6b2d35f3ce8328285f44660da6725ca2827247d838ae9bb7328a15a2c26c9f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 5140 bytes
font_01_sfnt_off00006a00.bin
84538268d304e4fce8f2908435098e17df8241d301385deac5ba438587fd6285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A00 10984 bytes

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