Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3540a0168a932c…

MALICIOUS

PDF

60.9 KB Created: 2020-08-19 05:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dde2d71bab50cecd46649c580009d13e SHA-1: 43f4022efe0138f6728d63caae22e71525115098 SHA-256: 0b3540a0168a932cac561064106f6b77083a1fd6e847cc6f32d386c3644f420c
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' lure further supports a phishing or scam attempt. No scripts were extracted, but the embedded links suggest a drive-by download or redirection to a malicious site.

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.ru/pify?keyword=coolie+full+movie+free
    • http://files.tylergulden.com/uploads/1/3/2/8/132816096/rabuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0240/3750/files/agm_service_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/jutazexonulaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/10_000_reasons_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/12736516591.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/.pdf
    • https://cdn.shopify.com/s/files/1/0452/4458/0002/files/certificado_medico_bolivia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0641/8331/files/upcoming_bank_exams_2020_20_full_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/kill_all_node_processes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1442/1653/files/biofeedback_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/zadalorikinimupotategu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008de0.bin
ff7043a75879f0c79b51f0b03cdb08fb8d78550efccea71092d33c2cc21f6589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE0 2988 bytes
font_01_sfnt_off00009893.bin
544363fd1625e857b880816092174556abc171efffffb4f7080f5c02215a9ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9893 4492 bytes
font_02_sfnt_off0000a7c8.bin
54c88ec55dcb2537955914982610897489272054ea62b36039eae87f40413afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C8 14088 bytes
font_03_sfnt_off0000d167.bin
8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 16028 bytes

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