Malicious PDF — malware analysis report

Static analysis result for SHA-256 66944d7548bfb12c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-27 22:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4fe5fd61d4d4bc8d22370d44213f9ee SHA-1: 0b78b12e8bee7a9310095455238425f3d0798416 SHA-256: 66944d7548bfb12c89d97c276f8c481f7d1a382e7484ba32802b3f16a76008c7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/pify?keyword=vacation+movie+free+streaming', is identified as a malicious redirector. The document body also contains numerous links to external PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection attempt.

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 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.
  • 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=vacation+movie+free+streaming
    • http://files.msudestinationauction.com/uploads/1/3/1/3/131384400/57d7fb6a064cf3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/accounting_cycle_project.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/79141641065.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/92308380759.pdf
    • https://cdn.shopify.com/s/files/1/0432/0565/6736/files/historia_del_derecho_mexicano_de_guillermo_floris_margadant.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/modelo_de_articulo_de_opinion.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/dojagoxonijilumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/answers_in_genesis_vbs.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/medical_certificate_for_school_leave.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/risk_assessment_matrix_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006605.bin
214e6eab278b3730f5e5a1adb01f890ec1e5b8c92acf540423e03d0b668cb08a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5196 bytes
font_01_sfnt_off0000779d.bin
ce7f0a157db32c33b9a611b1dfe2004ab586bff91ca78e40c43ce5293b028de2
pdf-font-stream PDF embedded font (sfnt) at offset 0x779D 10068 bytes