Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b47bd67f7ff67e9…

MALICIOUS

PDF

72.1 KB Created: 2020-12-31 01:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f788c00697bc6f25b15931d8e80978d SHA-1: 355594d3b04e7e84ddec3bb08e8b807283aa0a12 SHA-256: 2b47bd67f7ff67e9f18ac1c653be97bd019aa87f7c3959db8755d3db78e31255
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one specifically pointing to 'trafffi.ru', suggesting a phishing or scam attempt disguised as a coupon offer. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffi.ru/123?utm_term=new+march+2020+dsw+coupons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5fa6f241756a2.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/hbhadTO/blonde_buzz_cut_woman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fb5419753ba9.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/fiwusobitoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5fa49ce820dbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fe356e71c938.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5fde81261cc8e.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/rDahehg/buveraratukemiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/physical_descriptions_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/49287701573.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/eyelash_perm_kit_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/sefoxamerodaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5616 bytes
SHA-256: 8d11ff2345b2d962537d6738c288e71690d3098ed52e90cce275a8f1feef6f1d
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 11440 bytes
SHA-256: 7d7d43f86c68348087b98aa4990b099076320e4624178a27adfaade538fb9a56

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