Malicious PDF — malware analysis report

Static analysis result for SHA-256 27616746c2f4deeb…

MALICIOUS

PDF

46.3 KB Created: 2020-11-05 06:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e66a156e7dc1760dd01706a598cd484 SHA-1: 0619cfddea6f884395e53aba54e7377094220f76 SHA-256: 27616746c2f4deeb820872492652f57af1df6cf336e75f641fae6956b418fda0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Kansas shawnee county outstanding warrants' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/aws?keyword=kansas+shawnee+county+outstanding+warrants In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8f130568794.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/zurukuxidiro.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/9311307.pdfIn PDF document text
    • https://dunojezeb.weebly.com/uploads/1/3/4/5/134586234/7157407.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/majizenedixopo-zumow.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/xidofijeji_ribasudutobume_fitezefoxefer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5fa30034b87cc.pdfIn PDF document text
    • https://mibonapa.weebly.com/uploads/1/3/4/3/134308174/4850346.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/4d05d9d5-4e05-4abc-9d34-eb509b0055a8/samsung_gas_range_nx58h9500ws_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/adenocarcinoma_tubular_gastrico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59086ef2-9e4f-4ac5-82d5-176939edd53d/35678351654.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/fofimugol.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_off0000669f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5216 bytes
SHA-256: c003dfd59a33b8867cd95f09811e30b4a9f0b4c2823368d70969d80b42e61ab0
font_01_sfnt_off00007869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 11148 bytes
SHA-256: d7792628ffec48561483892c59e7fef68cd7674dc8ff888b7729be8b11856546
font_02_sfnt_off00009e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E69 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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