Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff882d5407838d1…

MALICIOUS

PDF

37.2 KB Created: 2020-09-17 02:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f9d743ab112393337a6458963c9048 SHA-1: af694a645d1c7e6e29007e439d08d74e32f0ba7c SHA-256: 8ff882d5407838d11b34f4ab27b2dac065426b677d3afb4852b10616ca738e88
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL disguised as a document download. The primary malicious URL is https://ttraff.club/wix?keyword=rocket+surgery+made+easy+pdf+download, which likely leads to further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links supports a malicious intent.

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=rocket+surgery+made+easy+pdf+download
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/34133110254.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/bouddhisme_de_nichiren.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/baditikedijamas.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/mupuwotidi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/33061668377.pdf
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/libertango_cello_solo_sheet_music.pdf
    • https://f2af418c-fe8a-4a06-961c-4dfa1c4eac18.filesusr.com/ugd/221eaa_01215cd1faa74335b7b9defa812f3ab4.pdf?index=true
    • https://a2eb6bc0-092f-4398-8592-84ef960bf096.filesusr.com/ugd/c068f8_37414f97ce5e4a04ba01ad3fadf9f2f4.pdf?index=true
    • https://7b52cdfc-10e7-40dd-b787-94e8c67ed3a6.filesusr.com/ugd/1d3654_f52799bb61b74dd282aec7548f2088b7.pdf?index=true
    • https://a3c34da6-875a-4292-8c7e-42b09ec5dcfd.filesusr.com/ugd/dbbfd0_e9a54e0f8dff42da9524d24dd5a3cc7f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/80s_neon_font.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/15315678531.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/calculos_para_caldeiraria.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/wiwituluxuwenovug.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_off000052d7.bin
a1001010291f57be5637c762149076a655a7ce3a30b589d243c3934b9c772b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D7 5740 bytes
font_01_sfnt_off00006678.bin
e879b5a66ca6b7b1bb3820fc24408fc8358d943e098b8f7415208466c394fb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 9788 bytes

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