Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c9305d95e8fb63…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 23:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 788f90fec11d2ea4053872abb7aca264 SHA-1: 79318f7a1a35a053b31544119a3b433eb23ee791 SHA-256: 76c9305d95e8fb6367a09ffc3baf6f82496cc103f95cba28572023216ce584e7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=cv+latex+template+online' and numerous other Shopify links, suggesting a link farm or SEO spam tactic. 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/wix?keyword=cv+latex+template+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0465/0362/4856/files/preschool_counting_worksheets_free_printable.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/xexipulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/kewerapobaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/46995968934.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/o_que__capitalismo_catani.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/gotikanesaverugovozarafos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/1749531803.pdf
    • https://cdn.shopify.com/s/files/1/0460/9363/1652/files/best_automotive_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/57944926102.pdf
    • https://cdn.shopify.com/s/files/1/0440/3209/8469/files/accepted_2006_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/lamina_losacero_precio.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/wejaluginesibudofulibopid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/semirerurem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/29381442876.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/background_images_hd_1080p_free_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/kuvagezodesibilegoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.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_off00006ca3.bin
64b9bb07327f605ba549702d29432b3db4c581a9e78b86db2a4524014360fefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 4724 bytes
font_01_sfnt_off00007cad.bin
8f60a58270237eecdad7a2de222041abfab944ded5aa8043f95807afb4c7cf0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 10424 bytes

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