Malicious PDF — malware analysis report

Static analysis result for SHA-256 75564c93d47a30ec…

MALICIOUS

PDF

62.2 KB Created: 2020-07-30 09:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1008c727a68218a7305ca245f38da5e SHA-1: 02f101a6c3ce8c187910adc318a15c7e3bcb2996 SHA-256: 75564c93d47a30ec9a8e80e66e9defa38f200a6e7073bb0e5d40b197398342ae
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the ML classifier strongly indicates malicious intent.

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.ru/pify?keyword=standard+deviation+of+grouped+data+examples+pdf
    • http://files.holisticvoicecoach.com/uploads/1/3/0/7/130739069/2de5abc5cab0.pdf
    • http://files.artoframachandran.com/uploads/1/3/1/4/131454190/5799702.pdf
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdf
    • http://files.johnwilliamscounseling.com/uploads/1/3/0/7/130775025/7249548.pdf
    • http://files.eleanorwilkinson.co.uk/uploads/1/3/1/4/131413678/vorukeje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/bokobigobotakafuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/84473866096.pdf
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/85119432764.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/81320038074.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/2590590108.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/nirixavupitegidume.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/jidebamejiwuwexabet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3658/files/78920558448.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/nipudosonakusem.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/saluxife.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/18034323651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30549310566.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/naroguwogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5724/0478/files/39384658765.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_off0000b15b.bin
919075121e46c9f714b3705293ad5a87c26da4494a79c1fc7d488db7a9ef24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB15B 5476 bytes
font_01_sfnt_off0000c3e6.bin
36df6f0611eb80b29e107f4f8e2780f28f91a93d6b48babde63611acd6a3c45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 11352 bytes

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