Malicious PDF — malware analysis report

Static analysis result for SHA-256 176d2bb51298612b…

MALICIOUS

PDF

41.5 KB Created: 2020-10-28 15:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c9d8d30577693acdbe800e5168ba74 SHA-1: 11c08f97de4526e475362a0d9c4b5585740c9418 SHA-256: 176d2bb51298612bfe192b818dc599388be6f31f12c327c4a8d670f0bcfccfb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive lure related to 'Enfamil feeding chart' and embeds a large number of links. One of these links, https://gettraff.ru/aws?keyword=enfamil+feeding+chart, is identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=enfamil+feeding+chart
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/taranosebasulu.pdf
    • https://buserakufazuwus.weebly.com/uploads/1/3/4/0/134097478/5530422.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f873de7acdf4.pdf
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/puwep-jusulanafuro.pdf
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f94a7d7bd114.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8d2bc7e7e1c.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f88431da8f7d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuliwisuwig/mesomemamefe.pdf
    • https://s3.amazonaws.com/pisedij/migijufizalugo.pdf
    • https://s3.amazonaws.com/henghuili-files2/nubokuji.pdf
    • https://s3.amazonaws.com/tadovu/77405429616.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/47374697179.pdf
    • https://s3.amazonaws.com/leguvefu/short_business_proposal_writing_skills_questions_mcqs.pdf
    • https://s3.amazonaws.com/voxazedisula/mikomesapififorakupisajod.pdf
    • https://s3.amazonaws.com/fasanag/android_sqlite_tutorial_for_beginners.pdf
    • https://s3.amazonaws.com/datarofapakil/teoria_de_la_calidad_total_administracion.pdf
    • https://s3.amazonaws.com/vixuwogetiv/mefekafewoxukidudotan.pdf
    • https://s3.amazonaws.com/banula/wegomipurefigomolufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/does_guided_games_work_destiny_2.pdf
    • https://s3.amazonaws.com/roxawo/tapitijobepalulodanunomup.pdf
    • https://s3.amazonaws.com/lanorolowu/blank_index_page.pdf
    • https://s3.amazonaws.com/susopuzupure/49717906483.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060eb.bin
9089d25b475ae833616e2bd82f50272486b5855c9688e84eecd2012dbad2ae85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 5212 bytes
font_01_sfnt_off00007282.bin
0806639f2b9ca0dbb878780c971b7b3869d44ebb20ef20c3db970e4b39bf4b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 11320 bytes

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