Malicious PDF — malware analysis report

Static analysis result for SHA-256 08475f55bd3fdee6…

MALICIOUS

PDF

47.9 KB Created: 2020-08-22 02:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb8c6d16b5265b732cfcaeb2268f06a SHA-1: e3350fb4f927a6fc161bfa95c68816645cf2bbcd SHA-256: 08475f55bd3fdee6b3f95e70553988e347e0f9f8d2d77ab2bc5aed2508bbee67
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=canape+vector+tutorial+pdf'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the document body and heuristics point to a phishing or redirection scheme.

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/pify?keyword=canape+vector+tutorial+pdf
    • http://files.chambleecharterhighschooljrotc.com/uploads/1/3/1/4/131407247/3058500.pdf
    • http://xanos.newjerusalemfoundations.com/uploads/1/3/1/6/131606349/tidumidevesud_sakusuj_sebizutixawij_kazatarowos.pdf
    • http://files.goblinorder.com/uploads/1/3/2/7/132740549/5232215.pdf
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdf
    • http://files.stmarymagdalenewpg.org/uploads/1/3/1/8/131856531/badifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/tapowepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/93046969142.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/simple_english_grammar_book_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/19079576878.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/zegixofomemininapejepel.pdf
    • https://cdn.shopify.com/s/files/1/0437/4865/5265/files/magipuluxupaziwokomaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/4918574511.pdf
    • https://cdn.shopify.com/s/files/1/0449/8394/3326/files/types_of_sprinkler_irrigation_system.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8849/files/fotiwomulow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/calendario_lunare_semina_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/39993113519.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006920.bin
432618c7f6223e71fff8fcce2165ebf2f5cf92107eef6135397706de72e3753c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 4936 bytes
font_01_sfnt_off000079fd.bin
0ac68489534b574b1e74bd374683d5601b1577ff65bbad8f37fef390098a4010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 13372 bytes
font_02_sfnt_off0000a485.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 4324 bytes

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