Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c9655da7334e6e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 15:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a3f360b7fe1d1609ddc4ee75baecd2f SHA-1: c60dd0a42f4f791166398025d9603817b435bf0f SHA-256: 03c9655da7334e6ea0ae29b458341f6cde21b65709dbb2aa6556243e53a8e85f
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL containing 'ttraff.com/pify'. The document body, though heavily obfuscated, contains the same malicious URL and numerous other URLs pointing to PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://ttraff.com/pify?keyword=download+good+news+translation+bible+pdf
    • http://files.shannonmarieryan.com/uploads/1/3/1/1/131164132/9164117.pdf
    • http://files.spinecarechiropractic.net/uploads/1/3/1/3/131384018/30437.pdf
    • http://files.ddlist.net/uploads/1/3/1/8/131871625/vitapot-dizepup-menawelesiwexe-xefuramefaf.pdf
    • http://sidikijif.bluebridgelifescience.com/uploads/1/3/1/6/131606875/kabezepuromoseruna.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7727/1706/files/95817230283.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/riesgos_psicosociales_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/gigutafedumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/aggregate_planning_and_master_production_scheduling.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/weber_idf_tuning_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/berimodolexunebure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/34253683197.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/tepemu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/vesovum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055de.bin
23994a985f6e5663971fd99f3cb1e6298801572883ada0a4c7d0ba828c255797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DE 5440 bytes
font_01_sfnt_off0000687b.bin
6edd2dc65f8cc0d4bfc465674af3a6957927c9580e196fa1f2ecab0bfce717d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 2024 bytes
font_02_sfnt_off00007212.bin
7b052bc262a826649a945e4f0dc863279b410727fac410bdd3463aac5e631c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 10852 bytes

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