Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9b507603234872…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 02:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc695eb72c8e42373834d356992f6bcd SHA-1: 9b5d42d00535132adcd967d32dfacbe26e7cd8db SHA-256: ef9b50760323487219efff8c3996e773409fa9d3f9ed2796bce9aa0bc59689cf
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content. While the document body contains garbled text, the presence of numerous embedded URLs, including the malicious one, strongly indicates a malicious intent to redirect the user.

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.cc/wb?keyword=competitive%20advantage%20of%20nations%20pdf
    • http://files.rootedaltarministries.org/uploads/1/3/1/4/131438453/9505102.pdf
    • http://minodat.quekhin.net/uploads/1/3/1/3/131398101/2889736.pdf
    • http://timomuzal.sustainablemaize.com/uploads/1/3/1/4/131407005/sejukutunutigu-ragadoxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/magogimefemutujajobupedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/1365020261.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/jezarubo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/rexawuxivajerojevos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/49393318990.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/vudumesalibitusajaxojoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/3922/7047/files/17836518019.pdf
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/digital_microfluidic_biochips.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/8621583381.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/kazaromobunawemeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/lm2575t_adj_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/tivosebozufaxuvulo.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_off00006534.bin
61588dce64926fd6c4af71754383ca1c8e7e0ad9c8e5bd4662b271b0c36a6626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 5196 bytes
font_01_sfnt_off000076da.bin
095f28478dcbd35eaa7e57b66a71a522d5e7ee109fc647d99771a54fcf9972e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 9952 bytes

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