Malicious PDF — malware analysis report

Static analysis result for SHA-256 1435fec95b915d9b…

MALICIOUS

PDF

111.1 KB Created: 2020-08-10 04:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bd11e54540122057c65849b487ec11 SHA-1: e163000d9c186a5385be184cd88b6e816aabf652 SHA-256: 1435fec95b915d9b4ba0814cece13571746134074ff2ce12faa398bb7a15f36b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a link to a PDF about Ayurvedic medicinal plants. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=ayurvedic+medicinal+plants+and+their+uses+pdf
    • http://files.essentialdance.co.uk/uploads/1/3/2/6/132696512/viwul-jeror-wofewepan.pdf
    • http://files.amomentfrozen.co.uk/uploads/1/3/1/3/131378779/meruk.pdf
    • http://files.barnumbayyachtclub.com/uploads/1/3/1/6/131606687/7155090.pdf
    • http://files.newlifebaptisthp.com/uploads/1/3/1/6/131636890/4628793.pdf
    • http://files.sbartiststudio.com/uploads/1/3/2/6/132695662/2708030.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/railway_air_brake_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/57418348671.pdf
    • https://cdn.shopify.com/s/files/1/0449/8666/3070/files/chad_country_profile.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/44376153300.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/advanced_trainer_2020_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/37020065394.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/xivijojole.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/wizogixedonarajesesawoxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3355/7149/files/programa_de_auditoria_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/fundamentals_of_accounting_business_management_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/befinukegijo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000169de.bin
fad79edd0e0d96a44e07fd76711b5aed6323b755887efd5a46cffe69a89b0ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169DE 3184 bytes
font_01_sfnt_off00017534.bin
6964b37d29d4fd8a18d977aeb93d65da9a970f9d11adbb17865f38f5a15d94fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17534 5548 bytes
font_02_sfnt_off000187f1.bin
9d78d64ef5d1df1e5123b6d8bea8740a34fa9ac7e50ea5962c726b245a84cfb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x187F1 11256 bytes

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