Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1dfb9831462016b…

MALICIOUS

PDF

61.9 KB Created: 2020-11-10 19:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0f56c0ea6eb687fda0907ef3494ffe3e SHA-1: 970167d3b00a534884bdf3fc5e1d5a67b011ca2c SHA-256: c1dfb9831462016bcd9bbca21544379d3bd254975447a7f754048e24209e6569
154 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 'gettraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the ClamAV detection suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?keyword=samurai+buyer+misaki+scammer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f8bb12f6308f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b896029-4190-4565-82e4-e29cc6f5c373/the_crucible_john_proctor_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/jack_reacher_killing_floor.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/95117025485.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/short_vowel_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/furuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef8dcc4-63c7-454a-bcd1-3ff558c7d3d1/nuwixukizatubuf.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/endocardite_bacteriana_tratamento.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/blanche_knott_truly_tasteless_jokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12d0563-77b8-4cbd-8ad2-be7698e8db1c/mr_waternoose_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/68985488327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c3aa14-def5-400c-9804-504570b751ae/ready_player_one_gundam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd8d356c-c81c-483f-b969-390dccd3bbbe/35631011695.pdfIn PDF document text
    • http://www.twitlonger.com/show/n_1spqIn 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_off0000b575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB575 5324 bytes
SHA-256: 4cfc3c4b2cd26b71175e473b280d1d810d2efe09ceb3e9f546b7ad184d819103
font_01_sfnt_off0000c784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 10440 bytes
SHA-256: aa964cf98072e756eaa2220953186bb6bf040ff529c1771e86e1c7ecaa9e9a68

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