Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbf6f4b6862c626…

MALICIOUS

PDF

50.2 KB Created: 2020-07-07 12:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: c21714582938e6b2afe025859409b214 SHA-1: e5d295859d559ac0ef896c5a6a6a4a77dda61c4c SHA-256: fcbf6f4b6862c626b714a1e90bca1e377ac12e53770d91ada9d291feb14786c7
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of external PDF links, indicating a link farm designed to distribute malware or phish users. The primary malicious link identified is https://ttraff.com/wb?keyword=teste%20psicot%C3%A9cnico%20detran%20pdf%202018#teste+psicot%25C3%25A9cnico+detran+pdf+2018, which leads to further redirection. The document body, though partially corrupted, contains keywords related to driving tests, suggesting a lure to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wb?keyword=teste%20psicot%C3%A9cnico%20detran%20pdf%202018#teste+psicot%25C3%25A9cnico+detran+pdf+2018 In PDF document text
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdfIn PDF document text
    • http://files.fresnonutritionsolutions.com/uploads/1/3/2/6/132683111/9806049.pdfIn PDF document text
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdfIn PDF document text
    • http://files.striba.net/uploads/1/3/1/3/131380413/9297027.pdfIn PDF document text
    • http://files.lindalgraham.com/uploads/1/3/1/4/131455283/7d86161771d526.pdfIn PDF document text
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdfIn PDF document text
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feramobelam.files.wordpress.com/2020/06/82713957353.pdfIn PDF document text
    • https://gefanopo.files.wordpress.com/2020/06/57369317049.pdfIn PDF document text
    • https://nuralezunawo436861297.files.wordpress.com/2020/06/72937159134.pdfIn PDF document text
    • https://lobukekitu.files.wordpress.com/2020/07/33386951844.pdfIn PDF document text
    • https://zasajeloso685135112.files.wordpress.com/2020/06/bitag.pdfIn PDF document text
    • https://nuragil.files.wordpress.com/2020/07/ranezukam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 5516 bytes
SHA-256: 969275b35479bdbe7e5bc8bb5942686ea84c70e08be90ba7da0ac8592e060732
font_01_sfnt_off00009402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9402 12484 bytes
SHA-256: 6356f9a9f8373847e09d19153306130cb0cecfab1d73ba60efd6e6191ca51883

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