Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be49ddcb186c2bd…

MALICIOUS

PDF

54.9 KB Created: 2020-08-22 16:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a565dd01bf4a28575cd677d0fedc1bb6 SHA-1: 401ac857b8bae8e1152061e1e0d323d881be5625 SHA-256: 5be49ddcb186c2bd6b5b0bd04a90a687764e17dd8ddf0f1827fd8baa5c3e8d77
170 Risk Score

Malware Insights

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

The PDF contains numerous links, with one pointing to a known malicious redirector. The document body and heuristics indicate a lure using urgency and a download button, disguised as a GMAT score report. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=gmat+enhanced+score+report+for+cancelled+score
    • http://xumivelob.cheerycards.com/uploads/1/3/1/4/131483152/26ee7454e2ed4.pdf
    • http://files.sarahlynncouture.com/uploads/1/3/0/8/130814717/4373872.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xazome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/metabolic_fate_of_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0448/5352/6690/files/xazolofanizamilokajamuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/kugimijoxetewotizutuzukek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0317/4308/files/dar_es_salaam_stock_exchange_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/vubarepoxonekotowowek.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/88498488838.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/fda_medical_device_reporting_database.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/php_generate_uuid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008317.bin
286859b6978eab4a9a58261ef3e2a4083c6d672e421ffd6f74ef323ab8f4c3ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 5428 bytes
font_01_sfnt_off00009559.bin
a479a9e0db564666a70519369f798aeb05260bce996800c5af87b0e9be9ba858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9559 10396 bytes
font_02_sfnt_off0000b934.bin
281214d1119d96f3a8ebe36682ff3c94e77595198e0ed7d049f81fad77dcdf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB934 16240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.