Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c84e46020104616…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 07:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca199dd5af69841c090822a5e36f87b SHA-1: 114fa67b1aea873bf3dfe5ecce1d2dd5caa99ce1 SHA-256: 8c84e4602010461639a93c6435714fc46d0ef8b2cdb8a1e297f2b0bbe6ab637c
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains this same malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=cancionero+cristiano+partituras+pdf
    • http://files.danielleleach.com/uploads/1/3/0/8/130874520/5236242.pdf
    • http://files.jr-accounting.com/uploads/1/3/0/7/130775520/e08915616e6f.pdf
    • http://files.colleenkelseyart.com/uploads/1/3/1/4/131407155/lokige.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/alcoholismo_en_adolescentes_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/bargaining_for_advantage_richard_shell_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/45447467808.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/graphic_design_salary_guide_australia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/rowudosowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/bdo_failstack_guide_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/19134829284.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/waxevuge.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_off00005c35.bin
d3ac47931d66a18c90f6a6255b5da876a54914eb76ed581353fde7e21d346890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C35 5024 bytes
font_01_sfnt_off00006d56.bin
b889d4ad7cff7b270860aa37325d2bef363f1b5306a97a537fa4a57c8c76294d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 10296 bytes

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