Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e58eb11ce25ffa…

MALICIOUS

PDF

33.0 KB Created: 2020-08-22 15:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab90d7fd70a576d659c7454889df14e3 SHA-1: 500bc1c8caaa6e557c3a30a1f5a74a228885e6f2 SHA-256: 09e58eb11ce25ffa3cea34ac4d912fd15afc7f32a3ef5af3d86fc04b3d272ae4
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content farms. The heuristic firings indicate the PDF is designed as a link farm, with one critical finding identifying a link to a known malicious redirector. The document body itself contains a mix of seemingly benign search terms and obfuscated content, further suggesting a lure to external malicious sites.

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=bhojpuri+bhakti+song+mp4+free
    • http://files.spotlightseniorserviceslasvegas.com/uploads/1/3/1/4/131454143/sewunubaza_wetobijakil.pdf
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdf
    • http://files.pfmorgans.com/uploads/1/3/0/7/130775977/fadoku-lavetevosudew-radagumipalok.pdf
    • http://gakivura.cocopahfarms.com/uploads/1/3/1/8/131856072/tilogedodi_sunuxowunod_zibidub.pdf
    • http://files.nysbpclc.com/uploads/1/3/1/4/131437493/5a82515aa7eeca7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/radubolebevafobeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/zezinajajirow.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/kebetozomarugusoxito.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/constant_values_in_physics.pdf
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/janume.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/79550702548.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/54612419670.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/abortion_journal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/adidas_platform_sneakers_stan_smith.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/cal_des_mort_formentera.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_off000042e2.bin
90f5525a6975abbcf292f30c72fa9f4802d3a582fed826c6318b2dd73a72a84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E2 5700 bytes
font_01_sfnt_off00005628.bin
87803296c9156407014eeeabe8ea36a1f6d9b28a1e56158d94a19535ddd2a9c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5628 9364 bytes

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