Malicious PDF — malware analysis report

Static analysis result for SHA-256 7533ea15392b9204…

MALICIOUS

PDF

37.9 KB Created: 2020-11-01 07:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 102306bf936339a79e02a149b7ff8907 SHA-1: 14d10b71dcfdf57532ddf8b79c22a3f197f5940d SHA-256: 7533ea15392b920480e6e1f8c9fbf6cf66fc958ca8172edfdb8b0212f7fd2775
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a malicious intent to distribute further malicious content. The presence of a "download button" lure and a link to known malicious redirector infrastructure at "https://cctraff.ru/aws?keyword=xbox+one+halo+edition" strongly suggests this document is part of a phishing or scam campaign. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/aws?keyword=xbox+one+halo+edition In PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/1e9592a4b7d8.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/6a08085.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/dbc72.pdfIn PDF document text
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/mudemo-mexuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f999b9253bb5.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/30111226b40.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/zokupodud-gileroduwof-dezifanawemefi-lovoxisapilu.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/refisetorizifeputi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8753f57b1d4.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/leributafa/lagumapujupewewumivifokoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b2f77e-bfc5-456f-931a-17b8565e0352/ladolupojakuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/jomasezekenarevapoji.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/fitbit_com_setup_manual_alta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863730a6-cd05-42e8-9db7-eed6c82e4c29/47036178995.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/narugifugukiwinazenopun.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/3203948065.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_off000055ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55CA 4824 bytes
SHA-256: 8d4c885a326f5654f446199df5345913cdddf57e94b76af5ed42c498da46bc3c
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 10892 bytes
SHA-256: 16284941f419d2f3afa87bb15655b3e7a9161ccd811f944c4f82caad2807dd41

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