Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfbde55c3e207d1…

MALICIOUS

PDF

40.1 KB Created: 2020-10-07 06:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f77ef1c20da21a6f9b0e13b040d7bab4 SHA-1: ea9cf071313b7f1a518c24825c52dff655633064 SHA-256: 4bfbde55c3e207d155b37ca21d2b1141a8b994e9c4318c75cc5f725ac9e14c54
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=los+signos+del+zodiaco+y+su+caracter In PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/53522727651.pdfIn PDF document text
    • https://site-1037203.mozfiles.com/files/1037203/winexobesiloni.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/feforaniwodowumi.pdfIn PDF document text
    • https://site-1039735.mozfiles.com/files/1039735/lozara.pdfIn PDF document text
    • https://site-1040597.mozfiles.com/files/1040597/bukutedukujojurajemus.pdfIn PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/jazexusipanasileg.pdfIn PDF document text
    • https://site-1038605.mozfiles.com/files/1038605/bapuxavipometamewex.pdfIn PDF document text
    • https://site-1038627.mozfiles.com/files/1038627/73533063374.pdfIn PDF document text
    • https://site-1038556.mozfiles.com/files/1038556/runegivolutekivaninal.pdfIn PDF document text
    • http://files.bbpickers.com/uploads/1/3/1/8/131856649/6149769.pdfIn PDF document text
    • http://baroro.caldwellgill.com/uploads/1/3/0/9/130969177/e48414272f.pdfIn PDF document text
    • http://rakepoji.artexfurniture.com/uploads/1/3/0/9/130969916/a3f2aa0be.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/8f9c6a7c-37df-46d0-bba1-5f653af47bbb/bajawofijosowar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee61c70f-1671-40e8-9703-8f7f2fa03c77/jifirelarakugolikosubon.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_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5200 bytes
SHA-256: 2ef47ca354d529472f5f4a16f8aa309a15e79ca7df874fb0c290fb2b5d3021f6
font_01_sfnt_off0000742b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742B 9196 bytes
SHA-256: 1aa009cc467d7e4db7a5341f041afeb2022176dcf74f45156267ba2052347a2e

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