Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70626a23b22075f…

MALICIOUS

PDF

41.0 KB Created: 2020-10-09 00:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 94888b38c480fb63f896e792012f15c4 SHA-1: e1eb00ef313d3b954745bab53e5471e6995e7220 SHA-256: e70626a23b22075f3186c4bbc487fef77b1e7ce2b15bd86ee9eb772a04c76aaa
124 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting and redirect to known malicious infrastructure. The document body, though partially obfuscated, includes the URL 'https://ttraff.club/pify?keyword=spanish+clep+study+guide+pdf', suggesting a lure to a malicious site. The presence of multiple distinct hosts and the use of redirectors indicate a link farm designed to distribute malware or phishing content.

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=spanish+clep+study+guide+pdf In PDF document text
    • http://files.centralofmelbourne.com/uploads/1/3/1/3/131381480/8442288.pdfIn PDF document text
    • http://files.banyantreehealingcenter.com/uploads/1/3/1/4/131408343/jexasuxilo-kekopuwan.pdfIn PDF document text
    • http://files.dakotayouthandyoungadults.org/uploads/1/3/1/4/131406448/buvum.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/68110709539.pdfIn PDF document text
    • https://site-1038351.mozfiles.com/files/1038351/zufitiwiwarisu.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/vuwaterukivole.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/37498023339.pdfIn PDF document text
    • https://site-1039460.mozfiles.com/files/1039460/94516077977.pdfIn PDF document text
    • https://site-1048531.mozfiles.com/files/1048531/wibugavumi.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/sivuk.pdfIn PDF document text
    • https://site-1038326.mozfiles.com/files/1038326/kenoniliw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000060a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A2 5528 bytes
SHA-256: 5ac9d404e771ba05210068867ac875c444680ec4abe681ca2cdbd91d857e930f
font_01_sfnt_off0000737a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737A 10812 bytes
SHA-256: 0b3da20d4c070dc3758e9b5f0dab7945e88a7807e3c06e8201c27b6d2e7cd439

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