Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4972706db31fb9…

MALICIOUS

PDF

61.5 KB Created: 2020-10-26 06:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7ba7f9c947474a3296347739ff7971c4 SHA-1: 3f967b93133f3ba8ab20c4aca19430199df38b0e SHA-256: 4c4972706db31fb9c12ce3054fc2c20018c47d61e2a7dbf129cd707fc6cadf4b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains the same suspicious URL and appears to be a lure related to 'Canadian food guide servings 2020'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the malicious redirect.

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/123?keyword=canadian+food+guide+servings+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f8c1e019b3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8782bfac8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f908a66900ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f88071be56e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8eb433e66ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f926af04571e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f875f23c3213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f87c85bd8b33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/types_of_verbal_and_nonverbal_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/hp_blade_server_configuration.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/63933461326.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/vadokurupizojafizibolo.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/zosuvitupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9961/7963/files/41567141015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8489/9011/files/folleto_tabla_de_la_alcoholomania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6501/6471/files/22686117710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/defibuwuvobufiwabedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/10630907530.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000be0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBE0C 23740 bytes
SHA-256: b0774701558494db37ed8d3fa2799f71638121df67481f7aad720ac8f452b222
font_00_sfnt_off00008808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 5284 bytes
SHA-256: e7141085cb2a6a2891c0830ec49896e84b44231a740ef08ea32551561a99c09d
font_01_sfnt_off00009a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A18 10496 bytes
SHA-256: f56f49da15ffd4a7e6ca2e9bda6e6ca56f1623b072caaffd1e15017bdac4e24f

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