Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c2d668839bbae6…

MALICIOUS

PDF

35.2 KB Created: 2020-09-13 11:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037786736d30276698d902858239bbc1 SHA-1: c2542752b8f7295cf0b142f70f99e0e953c40c38 SHA-256: 94c2d668839bbae64d329af500b5530464cb64f01acac78ac2b20d0ba3d85788
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.link/wix?keyword=hahira+elementary+school+hahira+ga', is identified as a malicious redirector. The document body, though partially corrupted, contains similar URLs, suggesting a coordinated effort to direct users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=hahira+elementary+school+hahira+ga
    • http://zivotoxu.todaysteachingtools.com/uploads/1/3/0/9/130969937/8e8d2.pdf
    • http://files.wildflowerphotograph.com.au/uploads/1/3/1/4/131453048/mosukalovikuruvuva.pdf
    • http://files.zferenovations.com/uploads/1/3/1/6/131637656/7496958.pdf
    • http://files.loellsstandardpoodles.com/uploads/1/3/2/6/132695519/00fb40b7dcbe07.pdf
    • http://korinewa.natureswaylabradorpups.com/uploads/1/3/1/3/131380505/1252908.pdf
    • http://kokizobe.mycentralparkwest.com/uploads/1/3/0/8/130814393/goravod.pdf
    • http://xunevifup.decoratingwithgrace.com/uploads/1/3/1/0/131070858/9edade8cf.pdf
    • https://static.usrfiles.com/ugd/7c41c1_e5652aabd20948b5be5a2874ac9eefcf.pdf
    • https://static.usrfiles.com/ugd/10b11f_73575930568748cdac9b2ba7b1bcd87a.pdf
    • https://static.usrfiles.com/ugd/b50c55_7debc709f57c4692a2191b81e2624ec8.pdf
    • https://static.usrfiles.com/ugd/0e6328_fdf63d342fea4c449d16a9ba10e486d4.pdf
    • https://static.usrfiles.com/ugd/4c3ae3_c19ed165c2b6457dbc2a59555de0b5aa.pdf
    • https://static.usrfiles.com/ugd/f99735_0c8b9e56b8614f9ebf1152793e9dc347.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_off00004bae.bin
50de57832086a39d0006610918f19df62b229357ab19cf9bb588b1f9ce712252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAE 5276 bytes
font_01_sfnt_off00005d7c.bin
09a8260cc16e1b246f7d7d3c59104136ccdf27bcc687f020e12582f70760480c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7C 10156 bytes

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