Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c52bcec4f337e9…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 05:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba118b6a0dc18fc7447e3764a0dccaf SHA-1: c2a39f1cd1ab3b8a6e0397557d30bf02f8d1d8c8 SHA-256: 06c52bcec4f337e9253495dbe0eb35af34b1f5d9f7951f8860dbcf60c831d5a5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though partially corrupted, includes text related to 'hand hygiene per cdc guidelines' and a URL that points to this redirector. This suggests a phishing or scam attempt, likely using the guise of health information to lure users to malicious 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 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.cc/pify?keyword=hand+hygiene+per+cdc+guidelines
    • http://files.hessleyrey.com/uploads/1/3/2/6/132681560/2d6ab131.pdf
    • http://files.innervoiceintuitive.com/uploads/1/3/1/4/131437832/7492646.pdf
    • http://golenaxo.lynnstoneking.org/uploads/1/3/0/8/130814788/mepada_sujogajofinel_togumitodopage.pdf
    • http://gataguwov.gotoplanetarium.com/uploads/1/3/1/6/131636881/45c13bde75ba5.pdf
    • http://files.sthelenskarate.org/uploads/1/3/2/6/132695397/4d83df0a1c3bef0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/deficiencia_vitamina_b12_sintomas_neurologicos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/58263806394.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/45231951295.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/bosoxujibukegosek.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/69456206691.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/visual_basic._net_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/sample_gallup_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/divuzegerilitozin.pdf
    • https://cdn.shopify.com/s/files/1/0439/0001/0664/files/abbas_ibn_firnas_biography.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_off0000652c.bin
25095dec9b6b52fbc8dbdbf4df7f352d46bc3d47fbe0473001e1907803761a7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 5400 bytes
font_01_sfnt_off00007779.bin
427a4a9c994a13f5811fd62e20037bc20515537d5f55697e89a9087fffa7c4b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7779 10352 bytes