Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d12fcf697667cbc…

MALICIOUS

PDF

33.4 KB Created: 2020-09-19 09:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c70d9612235e11a52a74b49fef4e6e82 SHA-1: d4f70f33e9b5e7373a0104aeae907f1d4452b871 SHA-256: 5d12fcf697667cbc054bed846f1558352ab53a093d99e9aaedfc4d34997dc45e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on suspicious domains, indicating a link farm or redirection strategy. One prominent URL, 'https://ttraff.me/wix?keyword=zombocalypse+2+unblocked+hacked+cookie+clicker', suggests a lure related to games or popular search terms to entice clicks. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

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.me/wix?keyword=zombocalypse+2+unblocked+hacked+cookie+clicker
    • http://xatipivu.csafcatsanctuary.org/uploads/1/3/0/8/130814535/vaxefi-sotemafiz.pdf
    • http://binexosu.amyforafrica.org/uploads/1/3/1/4/131453521/zibudobep.pdf
    • http://files.tambourunite.com/uploads/1/3/0/7/130738696/sajazegovipidojuv.pdf
    • http://donotelef.spiritualteapot.com/uploads/1/3/1/4/131437822/somugoromizupobogi.pdf
    • http://ginom.amores-project.eu/uploads/1/3/0/7/130740235/merazalo.pdf
    • http://fumalaj.fireproofshepherds.com/uploads/1/3/1/1/131163691/vakalupar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/pejewulafuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/pokemon_glazed_version_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/mafisesivi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/acciones_para_un_desarrollo_sustentable.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/28898282930.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/professional_development_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/see_chunks_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/zotujobulobopimukal.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_off0000440d.bin
b40f95134951e302ed248aaf4c9dfa7390b46ef121a3d7af41f0787f61b2c4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x440D 5708 bytes
font_01_sfnt_off00005751.bin
1fc3963f350c034f8a02441b5ee947d9af51733e3396434aab2cfe0999aa1425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5751 9800 bytes

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