Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0b4542f94e0c3b…

MALICIOUS

PDF

64.7 KB Created: 2020-08-30 16:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f1fdbb606b7de4704dfd96e7bd1f480 SHA-1: 670f0a2bca0f3df8a73690f54fa92d78b8923923 SHA-256: dc0b4542f94e0c3baf3d0d0b546ec135f955f42a9bf720a931445b2e5bc57a3c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=protocolo+de+investigaci%25C3%25B3n+cient%25C3%25ADfica+ejemplo'. The document body, though heavily garbled, contains the same URL and text suggesting it's a lure for a scientific research protocol. The file also exhibits characteristics of a link farm, with numerous external PDF links, indicating a potential attempt to distribute malicious content or engage in SEO manipulation.

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=protocolo+de+investigaci%25C3%25B3n+cient%25C3%25ADfica+ejemplo
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/96129414036.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/syro_malabar_liturgical_calendar_2019_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/89004164762.pdf
    • https://cdn.shopify.com/s/files/1/0429/4426/6399/files/induced_abortion.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/penguin_ambidextrous_vertical_mouse_manual.pdf
    • https://static.usrfiles.com/ugd/b48b60_e93f263804964ee2bd85715f59284c27.pdf
    • https://static.usrfiles.com/ugd/b972d5_4dff336dced34e5f9f3a12ca7dd59b86.pdf
    • https://static.usrfiles.com/ugd/accd1f_ec338c74e6e54388b072c6c1e881b15b.pdf
    • https://static.usrfiles.com/ugd/10b11f_01f54a9244c4416fb4450106123c4beb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d06ffd7ee54146a207f73ea5f90603.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/65966715879.pdf
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/zuruseji.pdf
    • https://static.usrfiles.com/ugd/b8c837_f23cfcb6d57948f9967fdc9a53116e2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ffa29e2927241dbb696feb56b15238a.pdf
    • https://static.usrfiles.com/ugd/122077_8b99488ccfbc48ef94e6632e6b5e8b02.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_off0000b7f4.bin
559ff11d4099c3b5fe6a9b0412c3a1e3dd18522c816cc5b0de7f018aed441ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F4 5804 bytes
font_01_sfnt_off0000cb5f.bin
ef8fdddb91d6506158728e92840b61b4094a2f91be32f45f82d26c001c016c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5F 12392 bytes

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