Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b23a702162af90…

MALICIOUS

PDF

40.0 KB Created: 2020-08-17 00:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e2744a458bbb8323cd6f9295cc243a5 SHA-1: 339a69c1ebe53df928a366ca6bd581627e2bad06 SHA-256: 60b23a702162af905b7c7ba9fcf51aadecfa3d35840f69974c25288a3d5dbd66
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Cheek cell lab report results' and the malicious URL. The presence of numerous Shopify links, some confirmed benign and others unknown, suggests an attempt to blend malicious links with seemingly legitimate ones. The ML classifier 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/pify?keyword=cheek+cell+lab+report+results
    • http://wasora.alessandrofanucchi.com/uploads/1/3/0/7/130739240/7038072.pdf
    • http://dosofit.astaratours.com/uploads/1/3/1/3/131378776/81c19c6dba7.pdf
    • http://files.mofflongboards.com/uploads/1/3/0/7/130776858/xafamezoxosimiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/analysis_of_qualitative_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/7519/8373/files/sas_statistical_software.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/the_last_jedi_metacritic.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/amoeba_sisters_cell_transport_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/4078993240.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/28415767095.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/764977091.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/belajar_tajwid_dengan_mudah.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/love_stories_to_read_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/add_watermark_software.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/95719173718.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_off00006034.bin
a177d69f88c9f2c3a2843b8797d07655dadf40cc512f67173533e47196b2d63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 5132 bytes
font_01_sfnt_off00007195.bin
82215a1f552c8ea06cbfaeaa92986e51fab01ecc6e577ad9f7bf4f2a0ec3e585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7195 9908 bytes

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