Malicious PDF — malware analysis report

Static analysis result for SHA-256 0405663e8d83d090…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 05:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dbafa9d15a9350ca08d518f26c341bc SHA-1: 6e5095c474d3889894b6cfbf988d4dc1d402aea8 SHA-256: 0405663e8d83d090937ec7e0d616b0d158814ec9010a0eb6a9c8f393548c1198
162 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=boot+camp+mod+apk+free', suggesting a lure for potentially unwanted software. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.cc/pify?keyword=boot+camp+mod+apk+free
    • http://files.tokyomath.com/uploads/1/3/2/7/132712129/a5aba59.pdf
    • http://files.live-for.org/uploads/1/3/0/9/130969683/fawusip_bokubazifusetok.pdf
    • http://files.littletonpreschool.com/uploads/1/3/0/7/130739826/boxafabenupe-vageziril-vofafunufob.pdf
    • http://files.courtenaylbc.com/uploads/1/3/2/7/132740264/3256838.pdf
    • http://liwivopat.alexandriahansen.com/uploads/1/3/2/8/132814930/a136382de5e8170.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/seramibadop.pdf
    • https://cdn.shopify.com/s/files/1/0429/1067/9203/files/3630501858.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/ketanojusekofivusud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/definition_of_business_economics.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/fepavaxemoro.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/85120045741.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/bumubajuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/cardo_santo_propiedades.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/jibuxa.pdf
    • https://cdn.shopify.com/s/files/1/0445/3875/7284/files/envision_math_2._0_volume_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/sumosalibaxopaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/1001_expressions_pour_tout_dire_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/xavoxumisix.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/mechanical_drawing_handbook.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_off00005b5f.bin
ae8f9ade5cb2980c3db6d3b477b9e7d3a809479b2d566257d7f63127d7155b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 5204 bytes
font_01_sfnt_off00006d02.bin
e03c47c1f20f34181748c54339115227d96c88d20b63942a8367c430987ab56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D02 9956 bytes

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