Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e86e301a266853…

MALICIOUS

PDF

60.9 KB Created: 2020-08-30 00:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19c83749555d83b095968c9b80ff2cd3 SHA-1: 3299bec03dd207c3c32450e4f13264e5ba243295 SHA-256: 59e86e301a26685398dcb1aa7eb5f8675abfb0b8feac858adfdc3b95e9477902
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The embedded URL, https://ttraff.cc/wix?keyword=untold+tales+warrior+cats, is the primary indicator of this malicious activity. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure.

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.cc/wix?keyword=untold+tales+warrior+cats
    • https://static.usrfiles.com/ugd/b8c837_f5f3e3d5a9e3433186ffa68aeeea68e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c45879901e34e7a9171cf37e6f36f16.pdf
    • https://static.usrfiles.com/ugd/0c41e7_4f7edc137ee949fb8875d6742a19aa19.pdf
    • https://static.usrfiles.com/ugd/e5a943_b0c4c1bee97d4e29bc2b5cd5a4b65fb2.pdf
    • https://static.usrfiles.com/ugd/af0aa9_1e3e4c5ad1124f30a10a37acb9884d8d.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/formato_certificado_medico_escolar_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/janavirewezelofi.pdf
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/real-_life_discipleship_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/lidorufiborinonepom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/report_for_work_l_g.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/elvis_suspicious_minds_lyrics.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_off0000b191.bin
6482cfe7e7e1c3be078cb440d46271d1f4b040960eae8b31e72de1cbb411aefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB191 5016 bytes
font_01_sfnt_off0000c2bd.bin
dfdcd2277d9969e85bff5a25514831fa468fbbffefa494f0eda072b62beee38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BD 10652 bytes

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