Malicious PDF — malware analysis report

Static analysis result for SHA-256 facf9cc285c5f748…

MALICIOUS

PDF

42.8 KB Created: 2020-08-10 10:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a994dca03d658a46dd7b15dd862a29c3 SHA-1: d4fc2e791bd17dfb4c823dfb30021a46b32c2ebf SHA-256: facf9cc285c5f748cf58699d8d9241d966499f3cdaf5610206728259a7b4b645
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a financial analysis document. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the PDF is designed to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains the URL that triggers the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=common+size+balance+sheet+analysis+pdf
    • http://files.warriorcreekdevelopment.org/uploads/1/3/1/0/131070152/57e85811f408cd.pdf
    • http://files.windsweptwillow.com/uploads/1/3/1/4/131453068/vozewu.pdf
    • http://files.mr-stevens.com/uploads/1/3/0/7/130776864/zoxakaso.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4882/files/74256801596.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/dadajonuxokun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/94310621756.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/92102289927.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/mechanical_engineer_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/guzuwemoxejozin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/59792438425.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/autodock_vina_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/70244789189.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/3109643782.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/dekalabale.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/77405533391.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/58177104771.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_off000067e1.bin
94bfc47fa2c5c0c3ad1e7be4c595a89c12351b2f74b47e8e0dddc4e153e4997b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 5496 bytes
font_01_sfnt_off00007a78.bin
52177c942c220959e0fa91b2865ababa5c6ce07c57a307abcf611a6ef74b87ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A78 10420 bytes

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