Malicious PDF — malware analysis report

Static analysis result for SHA-256 db80ba53c5c9623b…

MALICIOUS

PDF

43.1 KB Created: 2020-10-10 23:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ed0cc029f825f8c55cb48b2cf00fd035 SHA-1: 382d2acd72a1475c455926164d1dd2826ef420b8 SHA-256: db80ba53c5c9623ba7809bef1dd453ab1b8ad40397b28772d912d868031e2ef8
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a "blue jacket manual pdf". The ML classifier strongly indicates maliciousness, and the presence of multiple disposable domain links further supports this. The primary attack vector is likely spearphishing attachment, leading to redirection to malicious 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.link/pify?keyword=blue+jacket+manual+pdf In PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/xolufurasagatafixul.pdfIn PDF document text
    • https://site-1048529.mozfiles.com/files/1048529/siwenexoviturawojewena.pdfIn PDF document text
    • https://site-1048248.mozfiles.com/files/1048248/wikitolen.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/54122878593.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/43298498422.pdfIn PDF document text
    • http://zejenaga.pemrevision.com/uploads/1/3/0/7/130775734/wixobituve.pdfIn PDF document text
    • http://files.abckidstherapy.com/uploads/1/3/2/7/132740584/dizoluraded-nomazafojitin.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/felidupepak.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/wufubudukitopoxilakame.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/40496639714.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/c440e84a-3450-40b0-bcfd-8fdb27e3d1ca/kefepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d9fb6b-aac5-4f2c-aac3-7a7ff3e21653/dukef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c677a58-56c5-4ce8-879a-40fbabe0a1f5/baresegelatusititafef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/607ae503-1acc-459e-a693-a29703bbb2eb/xegotijevarosozebose.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_off00006a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7B 5216 bytes
SHA-256: 92fa935c744e78bfbeddd95bf1494dd69360d30fa99e3eb1034e09ac8ebf2d9b
font_01_sfnt_off00007c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 10320 bytes
SHA-256: 95d76da36610dceaf62e7e57a8cc916e0ca5037c876a8856eacc6c11e8feaa86

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