Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2def9bae9107f06…

MALICIOUS

PDF

43.2 KB Created: 2020-07-13 16:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf14824ff7edd3c0ded37716dc5ee6d4 SHA-1: 20a3748df8d3458ae51baba6a7c80a9f646099da SHA-256: c2def9bae9107f06ec9f29ae33f4f877995472002578aeebe0ee576f00e5056e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Genetics mcqs book pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

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/wb?keyword=genetics%20mcqs%20book%20pdf
    • http://files.mrsfeild.com/uploads/1/3/0/8/130874413/zamudedatum_tesorujutow.pdf
    • http://files.davidgarza.com/uploads/1/3/0/7/130776374/b939f2d.pdf
    • http://files.oneidcolumbus.org/uploads/1/3/1/8/131856827/9d0e80c727b33.pdf
    • http://files.jbmarbleandgranite.com/uploads/1/3/0/7/130738822/gifagoziridufi.pdf
    • https://webasaru.files.wordpress.com/2020/07/48239947380.pdf
    • https://konuvemove.files.wordpress.com/2020/06/kuwixumoguzi.pdf
    • https://felorige.files.wordpress.com/2020/06/88225926605.pdf
    • https://zafuvadel.files.wordpress.com/2020/07/34051599672.pdf
    • https://vuzixapixod.files.wordpress.com/2020/07/58648369046.pdf
    • https://refivoneb.files.wordpress.com/2020/07/50479980815.pdf
    • https://juxisaw.files.wordpress.com/2020/06/sotakuluje.pdf
    • https://lasofibile.files.wordpress.com/2020/06/lijevunidug.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/surozoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/ribolazoguma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/89426475249.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/57800195701.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8a.bin
f54584d9a6cb77a1f159730258bb7dc7330123bbe82acca5e9105c53c62e4aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5112 bytes
font_01_sfnt_off00007bda.bin
1198acf0ac35c5d7a01b3274523b3475310957d08581dd182be5386467c50a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDA 10604 bytes

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