Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d173f9075afc6b…

MALICIOUS

PDF

53.3 KB Created: 2020-10-20 22:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faf45142176ba26c5ade5791704fc3cc SHA-1: 9cf3111adc8141988d02f08e6ccf6fb1494004d3 SHA-256: e8d173f9075afc6b8bc02477d5725af47b9557561896133a2f1f70b6ba55a852
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on platforms like Weebly, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, and another flagged the PDF as containing a mass external PDF link farm. The presence of a visual download button further supports the lure-based attack pattern.

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://ttraff.me/123?keyword=tibbe+nabawi+english+pdf+download
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/masot.pdf
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/wijelifepixev-xoxiritug-bubixiwapamoxis-jojebaxadeji.pdf
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/5167020.pdf
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/4699676.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f89d5b1a27f8.pdf
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f8e8d00c5852.pdf
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f8a1b2ec0a44.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f8d0fee4a8db.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdf
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/poropafuxiruw.pdf
    • https://voduzivet.weebly.com/uploads/1/3/1/6/131607522/dcd848.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdf
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/ludiditepif.pdf
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f8e16e2cc386.pdf
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f87a10706a04.pdf
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8a70a716e35.pdf
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8789b4e4f26.pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87f1088d95d.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f8ca0bb67340.pdf
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f89130af2df3.pdf
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f8af41e3c2de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xanebavifamopez/ganepezuvizaketa.pdf
    • https://s3.amazonaws.com/felasorarabipis/pomifipidexod.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009f16.bin
f83aee6ce90c58c6ba0632bcca1cf85f739d384aae547345cf555caacfbcad0e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F16 23972 bytes
font_00_sfnt_off00005e8f.bin
b7071b4b77bb97960ce82c2be3adf6e20b9ecf556df6892d0e0f179494fda1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 5388 bytes
font_01_sfnt_off000070e8.bin
5ab2324ba9965cf9913cc460992dda72dcdbd03acfae78e920b439978f10a227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 14708 bytes

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