Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4920a4a9d83541…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 17:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2603ab379275cd23108276c8e135bbe SHA-1: 2e3a6253811781a71fb145e0564a31d75fb1f5a8 SHA-256: 3e4920a4a9d8354150df9b8e5f3940fededff6f2695baee0260cd5e2f68d7309
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into downloading what appears to be a free sheet music PDF. The primary link, https://ttraff.com/wix?keyword=dueling+banjos+guitar+sheet+music+free+pdf, redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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=dueling+banjos+guitar+sheet+music+free+pdf
    • https://static.usrfiles.com/ugd/585b1d_5efcefa26cff40579c0ff8851c037f18.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0412d6663414fa8aff2bbdb051e9225.pdf
    • https://static.usrfiles.com/ugd/96bf9d_e14e1d45d65d4623a1ba8ac6e0b3c212.pdf
    • https://cdn.shopify.com/s/files/1/0435/9900/3811/files/82847566995.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/xipaburemukilada.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/60345123598.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/alitalia_uniform_new.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/xajele.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/blufftitler_latest_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/calendar_october_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/3506230572.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/present_simple_tense_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/bidusawupo.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_off000079c0.bin
2d29e0df4e1c08bc502e8b1a7ce243f8c0cdeed176f89cb1e547358f1dee5b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 5668 bytes
font_01_sfnt_off00008cd7.bin
13acb857e3c897a4947203d642b47a4f3dca5d3a45af7b1d3d446f93920f9f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 16356 bytes
font_02_sfnt_off0000bf0f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0F 4324 bytes

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