Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb1b2cc7b2472b4…

MALICIOUS

PDF

69.5 KB Created: 2020-11-11 03:36:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa5d2a622edaa802b2164b3e59c1e931 SHA-1: 1ee9b33fe01a7ad80356081a91e02a6a4fbb229f SHA-256: 4bb1b2cc7b2472b487fea24db7edea03dd7d34923e7323cba6c4efeed7e18198
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and contains a large number of external links. The primary external URI points to 'traffine.ru', suggesting a link farm or advertising-based lure. The PDF structure indicates it was generated by wkhtmltopdf, and the presence of numerous embedded links points towards a tactic to drive traffic to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffine.ru/123?keyword=collagen+benefits+for+women
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fa974f129cd8.pdf
    • https://bobejezesolaz.weebly.com/uploads/1/3/4/6/134622741/2919140.pdf
    • https://kukapurabu.weebly.com/uploads/1/3/4/3/134375365/girabepeloz.pdf
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/02bdf2.pdf
    • https://kubegagalinono.weebly.com/uploads/1/3/4/7/134714436/4127756.pdf
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/baposoli-fegowopulu-rotovi-muximigumofa.pdf
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5fab32904b26c.pdf
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/fuxodopip.pdf
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8be05847a0a.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f874ad8e6f61.pdf
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/linewovup_katuweniko.pdf
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/1245811.pdf
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fa2ad2bbaf7c.pdf
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f93b1954acdc.pdf
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/kexagedidale.pdf
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fa9e8a4eda35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c86e.bin
d04eeec1c2b627789f29216336307b6562d3b83058e0298b945fd3a684a084a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC86E 5128 bytes
font_01_sfnt_off0000d9dd.bin
c25256d34ffb4feb7ec5b4ce9d1c91de54986c182d6a881e6acc8fbca755ffe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 9844 bytes
font_02_sfnt_off0000fb89.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.