Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a153ae3399c9099…

MALICIOUS

PDF

51.8 KB Created: 2020-08-01 09:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1a04705f534d6c9d4c67d6006936f5b SHA-1: 6787ab86c14a6965c1e20d177b09ce28be992519 SHA-256: 2a153ae3399c90996c63bb9e56bc19428d3d4797e2b0274519ef2accf342690b
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'Rookie Blue episodes', suggesting a lure. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, which are likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=rookie+blue+episodes
    • http://files.leatherandlavender.com/uploads/1/3/2/7/132712129/96fee3ba0926.pdf
    • http://files.conservationsupport.net/uploads/1/3/2/7/132740747/dedikezowomumuzamu.pdf
    • http://files.schwarzgoldce.org/uploads/1/3/1/3/131379692/283851.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/turij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/saxusebiliroworinib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/4995219763.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/labezebiziduson.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/usps_3602-_nz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/42492595198.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/16853340573.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/26948840196.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/30885578425.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/95317273131.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/80560117567.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8182/files/34981447907.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/roregonivamaxabozomomekeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/jegosopexavez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074bd.bin
25cd5d838610af34093fe6ed6a21cac8139df4a2162b04f5eaa7dab5335b31b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BD 4552 bytes
font_01_sfnt_off00008433.bin
b92c3f7d35347b2cc1848b90f92e31b29750fa51c412737ed30ed4f4af5a79ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8433 15448 bytes
font_02_sfnt_off0000b43f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB43F 4324 bytes

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