Malicious PDF — malware analysis report

Static analysis result for SHA-256 742771d19069330c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 03:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246165826b6fbeac0206d274ed7d9565 SHA-1: 8ea782015c4e719d818401d3fbcefd89ef471906 SHA-256: 742771d19069330c75cc623007071e22408d20c940f903d1d8fad01af028ff40
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at `https://ttraff.com/pify?keyword=building+and+other+construction+workers+act+pdf`. The document body, though obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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=building+and+other+construction+workers+act+pdf
    • http://files.drkatescranialschool.com/uploads/1/3/1/0/131069839/3373548.pdf
    • http://jiretifa.wegnerauctioneers.com/uploads/1/3/1/0/131070458/mixipawe-kapiwofadunuk.pdf
    • http://vowoxoma.healthwestrealty.com/uploads/1/3/1/4/131406592/7302992.pdf
    • http://lapisuw.papayabranchboutique.com/uploads/1/3/2/6/132682663/6562256.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/allemande_bwv_1013.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/81639672797.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/79326502992.pdf
    • https://cdn.shopify.com/s/files/1/0430/9922/6279/files/louvre_hotels_group_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/ragatezakik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/campbell_biology_in_focus_2014.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/bijixixewazapirevubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/types_of_algebraic_functions.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/mopusowuzaloku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/louisiana_literacy_test_answers.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_off00006644.bin
343a4fbc4b3ddf945cd38ad5481275f2631a5211b963c4a582615514e3e26683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 5624 bytes
font_01_sfnt_off0000796d.bin
15957c350bcd0c743a7f4ca40fe41ea77d1189a771607e686059f6775dc514a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 10656 bytes

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