Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25b7041d64a4693…

MALICIOUS

PDF

39.2 KB Created: 2020-10-02 19:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9edd59b754d92b41c318528a3ccb311d SHA-1: 84e3bc3d366a03969ba17a07efc0867b5879532f SHA-256: c25b7041d64a4693d34752b9b3290fd13860e06cb496a16488601980f3c71f4a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector services, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document's primary purpose is to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=soccer+heads+unblocked In PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/xegaze.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/bolow.pdfIn PDF document text
    • https://site-1039958.mozfiles.com/files/1039958/selamorowepamireluxijan.pdfIn PDF document text
    • https://site-1039967.mozfiles.com/files/1039967/30001939261.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/navunodojebivixojomozojup.pdfIn PDF document text
    • http://gelotoge.proplayhockey.ca/uploads/1/3/2/8/132814342/lepadag.pdfIn PDF document text
    • http://nurol.taliashaaked.com/uploads/1/3/1/4/131453005/7538781.pdfIn PDF document text
    • http://files.totsandco.org/uploads/1/3/0/8/130874066/gesobitodarakog-fetosi.pdfIn PDF document text
    • http://zawexap.wildtimes.co.uk/uploads/1/3/0/7/130739206/jujeretazeru-nozum-fapawedawonog.pdfIn PDF document text
    • http://files.kualalumpur-properties.com/uploads/1/3/1/3/131384301/5f515ff7d5b.pdfIn PDF document text
    • http://files.halalinjapan.com/uploads/1/3/0/8/130814342/3816665.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/60b7d977-4515-4d66-9b35-64ab67328d95/duwanonekididefibaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed58cdb8-1ce3-4efe-8abb-1313759bb4e4/makekukotunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2cbe06-05ea-456d-9c9d-4ff2d3008c20/jilojuvidig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c0f70c-3ee9-431a-8b42-9c536420aa48/murunumebunapepesun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C25 5088 bytes
SHA-256: 2f30225883335f531cdceff1fc306dcce64dba8bc838071f2f1216c7d2da0052
font_01_sfnt_off00005d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D47 11332 bytes
SHA-256: e11c6446bfba62380f0a4e97b71d3178af9e2494c188287af723208e0278fbb5
font_02_sfnt_off000081ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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