Malicious PDF — malware analysis report

Static analysis result for SHA-256 666d27445fca4bed…

MALICIOUS

PDF

45.9 KB Created: 2020-10-28 21:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 97992b412d078b8017b1e9e2be192ad3 SHA-1: 23c70c4afd7ca3b7637fe59f0695e0506fc5822c SHA-256: 666d27445fca4bedff4e8586c39f927300efcfab40a1232431ea5f3a3b16f08b
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. No scripts were extracted, but the presence of a malicious URL indicates a likely attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=ariana+grande+let+me+love+you+outfit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f979c20bc6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f8ad2fe59576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f9401c5222a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8874927cb6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b865c-a0e1-4ffd-a4c1-6b3733fa4ac9/duzowujivekew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2477c1-8007-41be-aabf-be27a077b610/susofotagunivux.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/documento_catechesi_tradendae.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6930/8572/files/89753214091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd63e675-4430-442e-a64c-10698e384923/gerazubilipokopikug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7450/9732/files/89564174177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4456/8989/files/84839887305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/50535217864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1eb6e84-391d-4bd1-b950-aa85580ff2cc/xelajuletuwopilatufexoden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6369d62f-7e2f-45c1-a682-58c0244807e2/tabanapupolibuzuxakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1187/3189/files/14031740110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28d0893-9798-4655-adbe-ee2245e749e3/tidilupunedajulusojenibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/kebax.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/fijosalujuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eda680e-3358-45eb-8fbd-bbf68ee32165/how_to_get_naydra_s_horn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/mujufokikapujomukut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 5200 bytes
SHA-256: 39588583d0551055c73f91245bb513b39c730700af4aeca5efa444ef2c65b96f
font_01_sfnt_off0000856c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 10924 bytes
SHA-256: 25a86f3572bdc2c036471dfc166fd892b9f8001032131de9bcc7acb3f706795a

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