Malicious PDF — malware analysis report

Static analysis result for SHA-256 954503b686bc4280…

MALICIOUS

PDF

111.1 KB Created: 2020-12-31 19:29:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 52b9d2dbde5af2fe766ac544047c25a3 SHA-1: 121130d6e30214d83ce1ed4637b265714ed18874 SHA-256: 954503b686bc4280f364013f5299f1152a535451641dd523e43e478b3516aa83
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 'https://gettraff.ru/strik?utm_term=rhythm+nation+1814+lyrics'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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/strik?utm_term=rhythm+nation+1814+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_5fb2c8f6936c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5fad9fd90b8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5fba4610d0de2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fcff07c5285e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fe70c0a94f19.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/hgejgFV/gun_master_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5fdc848597c9d.pdfIn PDF document text
    • https://cdn.sqhk.co/vozofugova/dOicjdp/38426669296.pdfIn PDF document text
    • http://www.opentle.orgIn 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/c2241f28-dfa1-4984-8c27-8e4ccb95ee25/where_was_grease_lightning_filmed.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/27568412966.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/lujepojemujit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef922d44-3bc5-4316-9801-94b1e9a4185e/nesolajuwaxeluzap.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/77425957124.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/57835822062.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16035 14472 bytes
SHA-256: 5660084c3180e67d77db8fa363f0000f52af25ce15127ae858bb10cd070bc734
font_00_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 3236 bytes
SHA-256: 961252e69c861caa8f87ccf2c6f0d87bc136c83b71bc86b99ca70186e57ec1f8
font_01_sfnt_off00014dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBB 5480 bytes
SHA-256: 419e8745a9656427d99db7acff2564cbf0ff87c121b4c61cd281a5f16429f867
font_03_sfnt_off000188a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188A3 11260 bytes
SHA-256: eceddee741fbc60609905365c10b6b4529f02456727c9b98a6f8529635ba004b

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