Malicious PDF — malware analysis report

Static analysis result for SHA-256 342779bd5808aba0…

MALICIOUS

PDF

35.6 KB Created: 2020-11-06 02:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 345311d01f28371157201dd5babca314 SHA-1: 327de8d091ec9dfa25c9ec7ca17c245cbf846b81 SHA-256: 342779bd5808aba04878ec0d922f0fe861a5f2cad6e07b1fcdcc02affabbf946
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/aws?keyword=oxidative+phosphorylation+pogil+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 2

  • 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.
  • 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://cctraff.ru/aws?keyword=oxidative+phosphorylation+pogil+answers
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/a83de2f.pdf
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/wuzolen_garemafobefex_bufitowakaxa.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/3722212.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/falevi/toyota_avanza_2017_manual.pdf
    • https://s3.amazonaws.com/tobobowu/75497209691.pdf
    • https://uploads.strikinglycdn.com/files/053e0981-595d-4468-ad75-1d0abfcf81e6/7987288827.pdf
    • https://s3.amazonaws.com/vetamedisoz/h_and_m_age_requirement.pdf
    • https://s3.amazonaws.com/muvojugejoxip/20406035445.pdf
    • https://cdn.shopify.com/s/files/1/0431/9730/0885/files/vizotikonizex.pdf
    • https://uploads.strikinglycdn.com/files/7aafa86f-7e55-4214-9eb3-51fadcd19fe8/acertijos_matematicos_para_secundari.pdf
    • https://uploads.strikinglycdn.com/files/75c6e420-a60a-4cdf-a08b-cb71be593782/32831347520.pdf
    • https://s3.amazonaws.com/davubewu/6661012862.pdf
    • https://cdn.shopify.com/s/files/1/0484/5535/2481/files/masipulafozunabomep.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f89.bin
037181c9a93256f6a086185a055b664f89e499cc12fb9eda30cf883b6b7d0167
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 5360 bytes