Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd92459a473d9b4e…

MALICIOUS

PDF

34.5 KB Created: 2020-08-31 02:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977c3b92aface9252a0ab90b7f93dca5 SHA-1: 974fbcbfbbe28ec22519a3287e653b3675a897c3 SHA-256: bd92459a473d9b4e0df105731c65a113fbb422abff47d9bffc4e67ccf648a4c7
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used in SEO link farms to manipulate search engine rankings. One of these links, 'https://ttraff.club/wix?keyword=1998+yamaha+big+bear+350', is identified as a malicious redirector. The presence of a mass external link farm and a malicious redirector strongly suggests a malicious intent, likely to direct users to harmful content or phishing sites.

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.club/wix?keyword=1998+yamaha+big+bear+350
    • https://static.usrfiles.com/ugd/b444d4_1da0fe9b42da4e118ee3992c11574f69.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a755108761114872b59b02021546ceac.pdf
    • https://static.usrfiles.com/ugd/b8c837_27dfb1cac86645f6af163c36c0c134d8.pdf
    • https://static.usrfiles.com/ugd/9a242c_0308c3e584c6488fb86e40d9e2c5c0e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/berta_v_c3_a1zquez.pdf
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/dorogaropow.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/24733819260.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/14469450009.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/gofanubejax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/turnaround_time_in_laboratory.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b58eef2d594002986b9e92037c8a4b.pdf
    • https://static.usrfiles.com/ugd/599f1c_bd27c24eb612401f87883ff03165507c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d131643174e403598696e0872934691.pdf
    • https://static.usrfiles.com/ugd/79e0dc_0efdc6056dfe45e2a89b601b6452270b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9ecb95da166493db45109e36c10740a.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_off000048a8.bin
c1362844e015c48149c0af7ea61f6c41a472412e4ed43d3ec0d5d033efc1e0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48A8 5868 bytes
font_01_sfnt_off00005c83.bin
e66c4fa681b48f1a61e8bfd630d9235debe74c6e2aec26a3895ff4618e96eb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 9668 bytes

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