Malicious PDF — malware analysis report

Static analysis result for SHA-256 75303e5fe7931a6f…

MALICIOUS

PDF

115.6 KB Created: 2020-08-10 15:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41e26d9996fac776213083efe8be5ec8 SHA-1: 0b82e7cfeadd47fedb55e43bffc64b7cbceba50d SHA-256: 75303e5fe7931a6fe861d935e06b45e4460a5063ae705e048abe6419d26961d8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. This suggests a phishing or scam attempt, likely using the guise of a free book download to trick users into visiting malicious sites. The ML classifier strongly supports the malicious verdict.

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=libro+el+cerebro+autista+pdf+gratis
    • http://files.tunnelberries.org/uploads/1/3/0/8/130874566/bejikadigiwuf-xuwolul-sepofolapepulet.pdf
    • http://files.flyinlions.com/uploads/1/3/0/7/130776735/9576723.pdf
    • http://xobibada.carpetcleaningsummerland.com/uploads/1/3/1/6/131636725/xevopora.pdf
    • http://vuxeziz.brandsafarihunt.com/uploads/1/3/1/4/131407406/0ffad81f585d94f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/57100989713.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/nuzovimoxagedudasajonof.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/wosikixevez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/vorozikowibubojukutomuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/introduction_to_polymers_third_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/brittainy_cherry_libros.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/urbanismo_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/muwuwumog.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/xorivixofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/latutevikokibopimejad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/68309405404.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/skyrim_strategy_guide_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/dinulano.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_off0001855e.bin
98c93c2ea0fc669076ca8c8d23862e4eb407bf50f2391442b3a45a5c2fe19336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1855E 5404 bytes
font_01_sfnt_off000197c2.bin
cc627e57b363f975f98ed4b020ce451f6cdc80a498e05c3271a2792c847072e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197C2 12244 bytes

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