Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f663b5e501d021…

MALICIOUS

PDF

47.9 KB Created: 2020-10-26 14:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 56c06feed66c9499cbeef7a9532e23e6 SHA-1: 191c11435e0e11c146b7ad4bf0fc2d5968762e07 SHA-256: b4f663b5e501d021f16651b83fdad602edf6fec38b9479f8ea0eacac51a68d94
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=folding+a+paper+napkin+to+hold+silverware In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5f8c89bb26c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f9331905e380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8d4af571f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8b793d1ff54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f92e6a9e17ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5f9672f8ad654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/xelut.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/indian_army_gd_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/budafulogazejegopabe.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/selimax_pulso_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/tazegolanudoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7423671-0b8a-47a7-9f62-0acd9fab6d18/25394398306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d07646-b0c3-4e05-b9e1-6731717bf080/tunexaterabokisowamebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5833/8210/files/28021746246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/sesumosukanupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5029/4171/files/john_kotter_leading_change_1996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/rororax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/fegodajopisojogogiwujo.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/lafawegisewuvusipo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/55917157280.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 5392 bytes
SHA-256: 58d2b223073bf6d54a688cf40f3fc7a138e9f5948f2cbdf762a3a3c6c2109546
font_01_sfnt_off00007a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 9844 bytes
SHA-256: 6ec549ef27d53f078353b48dc3c231bab87f00379dd45448bf3065c343aaecd0
font_02_sfnt_off00009c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7E 16232 bytes
SHA-256: a703e6540b2f59c28fc27e6593804b1013ae71cc4b0674c7b49900cf046a1ee3

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