Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77127f1780d9fb4…

MALICIOUS

PDF

43.2 KB Created: 2020-09-18 07:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290aa1aa0c4e75fd979be5cbcff20dc0 SHA-1: 30b64b0e7324a103b9ab02dd7b72909b3502f945 SHA-256: c77127f1780d9fb42b43605d8c03daaa9eb8e8bb38ca77fc2a39bf08c3600030
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=the+red+dragon+book+of+satan+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The document also contains a large number of embedded links, many of which point to Shopify domains, likely as part of an SEO spam campaign to mask the malicious redirector. 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.me/wix?keyword=the+red+dragon+book+of+satan+pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/mitizigidabebosefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/dangal_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/luresixifekulutobil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9816/files/relitebalepoburosuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/functional_strength_training.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0712/files/split_merge_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/5923/9325/files/71517023255.pdf
    • https://59fb9a90-ad76-43b5-9a94-c192c86ce21a.filesusr.com/ugd/80685d_9dc514d1a46d46c6a02c7debfe506171.pdf?index=true
    • https://b7ec6a86-d95a-47f3-9ab6-6fbb5df4d01e.filesusr.com/ugd/89441e_f459f27e29da497897c551be35fb9009.pdf?index=true
    • https://4ba7ddbd-b8fd-43c4-8176-cf2b44137fce.filesusr.com/ugd/e2b09b_89c4911ef5ea4708b1c88fb4ff14cabe.pdf?index=true
    • https://5f4b6895-8d63-4585-99f9-01cae0a9e48c.filesusr.com/ugd/8127dd_8a79bfe8ade34b8fba55791368b29708.pdf?index=true
    • https://00be06e4-e3cb-43e7-b827-d8934a13b035.filesusr.com/ugd/6908d7_e252718ffefe4b9b90ac99d45c4b89ff.pdf?index=true
    • https://007515b5-b228-4604-aaf5-7312ec1332b2.filesusr.com/ugd/26481d_1e230acf771b41e1a320354d3ccf89c6.pdf?index=true
    • https://b9992f50-beeb-4ad9-9c87-b0344b01f2f0.filesusr.com/ugd/c57cae_6b4566378ccd49c2a3e201a9ba840e33.pdf?index=true
    • 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_off00006b23.bin
26d160eb46c2033851e6523bbadf83399f42fb29d0c542edb9c8424d3d79c22b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 5424 bytes
font_01_sfnt_off00007d8d.bin
32fdd8b893ad3f2ae8fdacfcc1fd28bae422da06cd08365ea7917dc9207fb063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 10120 bytes

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