Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e387040403f00e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 19:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591a3ac5b493ff73b1fc93dc57cc097d SHA-1: c2c7e0f1ca66250d7b841c104ba0257a09404f43 SHA-256: 17e387040403f00e2eeeecac78a74990885afd0169b9f429acfe0118b4ff1850
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that mirrors the redirector link, suggesting an attempt to disguise malicious intent with seemingly legitimate content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=neet+biology+chapter+wise+questions+and+answers+pdf+free+download
    • http://files.griphero.com/uploads/1/3/2/6/132682646/xorixadifora.pdf
    • http://files.iseeyouministry.com/uploads/1/3/0/7/130739415/vitoguwobaji_zurodonixofidan.pdf
    • http://files.oldtel.com/uploads/1/3/0/7/130775714/57d6f9193b1e742.pdf
    • http://files.cinemaclubfilmprojects.com/uploads/1/3/0/9/130969459/5433442.pdf
    • http://files.hinghamspeechtherapy.com/uploads/1/3/2/7/132740485/4272081.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/60854849199.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/salesforce_developer_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/14257559834.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/3589602959.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/20774307751.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/osrs_earth_alter.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/sufotebafalimabiwemivugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/tupagazutovunip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/93015494377.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/depoveruzaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/datejukuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/33102666941.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5908/files/shia_books_urdu_download.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_off00006a62.bin
ab0bfa45d9ee6170d6c00684e805c4dec300976bf73d451a1006320a8439cbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A62 5848 bytes
font_01_sfnt_off00007e5c.bin
71c75edcde073ed71622dda0a01d78b9034da5fd7332c255385c9af6feb4854c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5C 10420 bytes

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