Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda8d1ead60af330…

MALICIOUS

PDF

145.2 KB Created: 2020-12-17 12:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42595ecaa5bd26393af6fd73ed55bf3e SHA-1: e13fc44be84da9d2ff89c8fdb5167a9f3a54e037 SHA-256: bda8d1ead60af330a6b5c5752e3cba1e796a27ac98b21bc98cd2b5e2bd868ce1
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs confirms the redirection attempt.

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=how+to+mod+ps3+to+play+ps2+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fbb243392fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5fd1b4a897c4b.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/lebaxa/libro_de_anselm_grun.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/87745285413.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f7efa04221c7117e003/1606377343855/binary_fission_and_mitosis_in_eukaryotic_cells.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/42355943742.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/35509863934.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/spotify_cracked_apk_no_root.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18272ff13940aa243ecad/t/5fc92dbe954c8374d810d647/1607019969550/radio_terra_nova_gafanha_da_nazare.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/bifotuzerelewevoluwaxamap.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/25631351755.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc158bd9b1ed035380e1e96/1606506688113/sarah_jessica_parker_perfume_born_lovely.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/convert_to_word_online2pdf.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_off0001ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF45 5632 bytes
SHA-256: ce7b5d5236067073c4b19299158782dd52f2be5d3fabd2eff27063be77ed3d46
font_01_sfnt_off00021276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21276 11040 bytes
SHA-256: 29772ef1ad9532eec439da4e4aaff38d4d02ba5b257bf8d535e749bb27fffb3c

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