Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62fb06a27a31cd7…

MALICIOUS

PDF

44.8 KB Created: 2020-10-06 11:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 369fd6e142fe1e7c1575339aaf08369f SHA-1: efd1789f387bcd69d6626215bb30dc72011486b2 SHA-256: d62fb06a27a31cd71044ae79e721ecbffe58c90f51b73ef87c3437d34a84da4e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document also exhibits characteristics of a link farm hosted on disposable domains, suggesting a campaign to distribute malicious content or phishing lures. No scripts were extracted, and the document body is heavily obfuscated, but the presence of multiple redirector links strongly indicates a malicious intent to lead users to harmful sites.

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=azura+fire+emblem+warriors In PDF document text
    • https://site-1039759.mozfiles.com/files/1039759/21612637978.pdfIn PDF document text
    • https://site-1038365.mozfiles.com/files/1038365/82951440651.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/zopiwulimiguxukan.pdfIn PDF document text
    • https://site-1039132.mozfiles.com/files/1039132/rijavikikoluto.pdfIn PDF document text
    • https://site-1043967.mozfiles.com/files/1043967/21789826982.pdfIn PDF document text
    • https://site-1039674.mozfiles.com/files/1039674/93214045893.pdfIn PDF document text
    • https://site-1040443.mozfiles.com/files/1040443/jusekax.pdfIn PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/497303362.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/81236826896.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/97697048480.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/mizikenapowagugotozexez.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/69225933650.pdfIn PDF document text
    • https://site-1038691.mozfiles.com/files/1038691/jisolapebo.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/xulemavunoninib.pdfIn PDF document text
    • https://site-1040297.mozfiles.com/files/1040297/tiribobexenu.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/dulupebewuwulejakewili.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA3 3152 bytes
SHA-256: b5e96711754b896992f25b5198b2db48944b9155ada9406fbf9ee167c25900ae
font_01_sfnt_off000067eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 5184 bytes
SHA-256: f94f93730da5a4cb45803dd369fdb6ff1e5c41a3fa7b15f431a8ff1987b80eb0
font_02_sfnt_off00007991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7991 14456 bytes
SHA-256: ef728efedbb0f4f0cc5ec261af9681ac7664c818f1092d045fa6c867055aae4f

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