Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eecbfb24810a08…

MALICIOUS

PDF

42.9 KB Created: 2020-10-12 10:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce55a87a66809e9fab162505d7c5eab5 SHA-1: 7be8af5c9b5688f463273fed2f99e3329a032c9d SHA-256: 65eecbfb24810a080267cd9bcac44b9ebf828a321528b3cc4525436e10c0e773
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, identified as a link farm. One prominent link, 'https://ttraff.link/pify?keyword=outlook+android+push+notifications+not+working', suggests a lure related to notification issues, likely to redirect users to malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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.link/pify?keyword=outlook+android+push+notifications+not+working In PDF document text
    • http://files.spiritualbirthing.com/uploads/1/3/0/8/130813373/pudeneragan-zexunavodo-tuwimij-gumovaxoba.pdfIn PDF document text
    • http://files.gotcertifications.com/uploads/1/3/1/4/131483009/8967167.pdfIn PDF document text
    • http://metir.hazzardcountygarage.com/uploads/1/3/1/3/131397997/tojusuripew.pdfIn PDF document text
    • http://files.tribetasrc.com/uploads/1/3/1/8/131856743/6266328.pdfIn PDF document text
    • https://site-1038567.mozfiles.com/files/1038567/88041619261.pdfIn PDF document text
    • https://site-1043124.mozfiles.com/files/1043124/15836359672.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/kutadumovekepijokukuniku.pdfIn PDF document text
    • https://site-1039251.mozfiles.com/files/1039251/rugonezori.pdfIn PDF document text
    • https://site-1038414.mozfiles.com/files/1038414/bevuvalezisabaxanuwake.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/51688422955.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/lofarivajomow.pdfIn PDF document text
    • http://files.purpledotpr.com/uploads/1/3/2/6/132681415/bifokatobojo.pdfIn PDF document text
    • http://xoroxox.soulfoodcafemission.org/uploads/1/3/1/8/131856646/midulufe.pdfIn PDF document text
    • http://files.aliciahitephotography.com/uploads/1/3/1/4/131453576/04a4931425ff655.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_off000068d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 5600 bytes
SHA-256: d88e486b1738b8a49dfc2e466db9e740ce3efe211a30e33ea88103095695bf7c
font_01_sfnt_off00007bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF5 10484 bytes
SHA-256: 39f1bfb753b5a49e497b42ffae7b8163b33aa3593fff37940fd47731c7a3f185

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