Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bd341cea99f141…

MALICIOUS

PDF

38.7 KB Created: 2020-09-02 01:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0135668682ddd0878493252324cbdd1d SHA-1: a36c5182535c4e3ec0382dfdcacbda1049e94d2e SHA-256: 28bd341cea99f1419753f80161465eec7e28a27efc8cf1dd441e5c45a0f6086a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and text related to 'Financial reporting act 1993', likely a lure. The presence of numerous other links to Shopify, while marked as benign, suggests a link farm or SEO poisoning tactic to increase visibility of the 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/wix?keyword=financial+reporting+act+1993
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/31910412366.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/93287305476.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/fafebadekekevelipixe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/jaxanod.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/american_english_file_4_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/hackerrank_vs_leetcode.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/21505661236.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/34433949632.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/pisalabegugogodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/zezedewapexidejelug.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/71491308942.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb5058c29704033828765542c911985.pdf
    • https://static.usrfiles.com/ugd/19ce5d_0910d7fa1d2840ecbd83a627e60facb5.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_off00005b27.bin
ea97ac481b947b629082d6343b1ab9f19a642882c8152c0d07319b14e6b66cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B27 5248 bytes
font_01_sfnt_off00006d1c.bin
c5960b9e7bafc69fced2084aa3ad78bf716834d3d2e4f0dc2199ce2a37ff47ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 9740 bytes

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