Malicious PDF — malware analysis report

Static analysis result for SHA-256 90944d83b9228fa8…

MALICIOUS

PDF

37.6 KB Created: 2020-08-20 06:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c9f335c3ea04688e82de8ae2dcdcc2f SHA-1: f9aa2eff54a7ec6043dc080cc0d45a884a2d0a9b SHA-256: 90944d83b9228fa846a107696d6b6bf3b6661f43312795290adb1b0a750a1cb5
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also assigned a very high probability of maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', are indicative of a phishing or malware distribution attempt. The document body contains garbled text but also includes the malicious URL, reinforcing the attack pattern.

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=kenton+county+ky+police+reports
    • http://files.jbelova.com/uploads/1/3/2/8/132815190/sesapuzunoxig.pdf
    • http://files.435676578364674396.com/uploads/1/3/0/7/130738615/ruwigavujekubofamu.pdf
    • http://files.stpaulsyr.org/uploads/1/3/2/7/132712080/3051535.pdf
    • http://files.moshathestylist.com/uploads/1/3/1/1/131164048/sevarepanuku.pdf
    • https://cdn.shopify.com/s/files/1/0437/7470/5815/files/ccm_hockey_jersey_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/article_of_association_notes.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/68178476009.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/kowikotunisapawerikoba.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/xusezonagabopasekisupeber.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0443/8438/7238/files/types_of_pneumonia.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_off000056cf.bin
ca2e9aadb8a17c17077dcfe388705b102bc550560086701fc3caa24da06f2989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56CF 4852 bytes
font_01_sfnt_off0000676f.bin
35b55ee9fd933d338c8f8f65812f6606ed6bb74513ce41109913c78ee393fad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 10144 bytes

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