Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5ca05e34d1e9ed…

MALICIOUS

PDF

50.3 KB Created: 2020-08-11 09:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a446155142957620df51a6deb463af68 SHA-1: 665f974509d3a63dcbb58ba1620196ad9c52c567 SHA-256: 0e5ca05e34d1e9eda0ac3881ac4f2f18fe4d0f561196dd8be192178abd94358c
174 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's strong positive prediction support a malicious classification.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=john+f+kennedy+airport+map+pdf
    • http://files.halloween5k.co.uk/uploads/1/3/2/7/132740502/092ea325.pdf
    • http://files.donandmargieabroard.com/uploads/1/3/0/7/130775126/be08bb.pdf
    • http://duvekiv.lambontheloom.com/uploads/1/3/1/4/131438800/kurujeke.pdf
    • http://zigate.stallionscouts.org/uploads/1/3/1/1/131164250/teforo_jovigenufu_witeles_dipogasisavi.pdf
    • http://files.thetravelexchange.biz/uploads/1/3/0/8/130814232/4300514509ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/titrasi_argentometri_metode_volhard.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/nupepebebizoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/ridowogabipaxobus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/67900727513.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/bapokuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7642/files/pmbok_6_agile.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/gejorazewilugazojirexedem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/advanced_cardiovascular_life_support_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/fatumuwunutipexaradewud.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/problem_solving_equations_worksheet.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_off000084ef.bin
9c25811ab546bfad50f4f2be476654401198cf43bfabc8ce66ff250e4157a4c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EF 5224 bytes
font_01_sfnt_off00009692.bin
0d12474f1e4ad2fbf2a22bb83c577a4dd381d7e0bcfb68a34ec479ad9e90585f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9692 11536 bytes

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