Malicious PDF — malware analysis report

Static analysis result for SHA-256 346fbcdc1908856d…

MALICIOUS

PDF

60.5 KB Created: 2020-11-23 18:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56dd6932c06f95d01e2ea20acf158079 SHA-1: 67359aee766321797ca6204ca95966738b3cd7b1 SHA-256: 346fbcdc1908856d0e8ada4a2b7c16259cd489db4f51304cdcb23232ed8941c5
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ggtraff.ru'. It also exhibits characteristics of a link farm, with numerous embedded PDF links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=calvary+church+souderton+jobs
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/tedavawibozekid.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f96de6709b69.pdf
    • https://sojugadetoju.weebly.com/uploads/1/3/4/6/134683069/1519172.pdf
    • https://cdn-cms.f-static.net/uploads/4464871/normal_5fb804b03d9ba.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/vusoligifolad.pdf
    • https://jameropavide.weebly.com/uploads/1/3/4/6/134699307/1678906.pdf
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/xival.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/likerajatob/vebuzetaseladuxexu.pdf
    • https://s3.amazonaws.com/fotepopunaj/wibutagupepenamezerodawib.pdf
    • https://s3.amazonaws.com/lorerexeg/welepanutolapupopinenokum.pdf
    • https://uploads.strikinglycdn.com/files/30c594ec-c03f-442a-8ad8-f967872cb5f9/fulan.pdf
    • https://uploads.strikinglycdn.com/files/9a7e4486-c217-4e86-8945-ffa2d3f2b4eb/xewibanaxu.pdf
    • https://s3.amazonaws.com/dazifozixawus/obituary_notices_template.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b04d.bin
b4e35c5c0e42e81d92ffc06ab714eec47807e23788d47046f1e76871bc582d44
pdf-font-stream PDF embedded font (sfnt) at offset 0xB04D 5312 bytes
font_01_sfnt_off0000c25d.bin
a58a4726680606d21451a63264a9502bec689c627a7fdff160eca5be8120c735
pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 10276 bytes