Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc63b06862e7582b…

MALICIOUS

PDF

34.5 KB Created: 2020-08-02 08:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b365a7216d07ee0c947ed370536034c9 SHA-1: ee989f08ba4224c4e363cb6f9bdc03373cb06cf6 SHA-256: cc63b06862e7582bac99764c8552be90763392eebf581a0b036e966b2f1a2c46
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, contains text related to 'scientific computing' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of redirecting users to external content.

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/pify?keyword=scientific+computing+an+introductory+survey+pdf
    • http://files.drmandiegillette.com/uploads/1/3/1/1/131164573/tuxazexebaneji.pdf
    • http://files.bestoftimeswatch.com/uploads/1/3/1/3/131379749/e4facd24be.pdf
    • http://files.hemabharadwaj.com/uploads/1/3/1/6/131607440/d53b7.pdf
    • http://files.columbusskiclubraceteam.com/uploads/1/3/0/7/130775275/ba5f42e4c0243d.pdf
    • http://files.hgafundraising.com/uploads/1/3/1/4/131437249/8283930.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/jewojuritixedufosiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/dabifume.pdf
    • https://cdn.shopify.com/s/files/1/0435/3468/0216/files/40511199672.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/57281757375.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/lufonisalabijejefolutudox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/30482771718.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/vabiwodovalixaveroked.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/rosuxumedorejekobufalizuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/7505/8329/files/pewulatis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/65328225472.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/78689858970.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_off00004b19.bin
102328a3ad18c284033ce957717b12bca60883b762ccae3ca490227bef05996d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B19 5708 bytes
font_01_sfnt_off00005e85.bin
8846cecd4d544a7ef8c36d47b4b2060c7e059b37a9f2fee12fe12dc82e75a462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 8868 bytes

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