Malicious PDF — malware analysis report

Static analysis result for SHA-256 5343c592d834229c…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 17:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee86b3a04b0689d628f0cde2a678eb01 SHA-1: fc9aee51a64b48728cee11cbf68f0fa8b879a3a0 SHA-256: 5343c592d834229cdfc7ae09b19ed56bc63bcf269f1aa5823a2dfaf0945bd63d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a large link farm. The embedded URL `https://ttraff.cc/wb?keyword=renato%20e%20cristiane%20cardoso%20namoro%20blindado%20pdf` is identified as a malicious redirector. The document body contains numerous links, many pointing to shopify.com, but also several other domains, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, limiting the analysis of direct payload execution.

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/wb?keyword=renato%20e%20cristiane%20cardoso%20namoro%20blindado%20pdf
    • http://files.re-bel.org/uploads/1/3/1/4/131410545/8133550.pdf
    • http://kibugaxi.beautifultendings.com/uploads/1/3/0/8/130813913/guxofikapofomenobeg.pdf
    • http://vujen.teaandtango.com/uploads/1/3/1/4/131438216/4cb9c.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/jufeboxumepepisanuvapuwes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/59807798777.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/irrational_beliefs_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/wexunukaxugem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/73494937788.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/gokuvinubazek.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/characteristics_of_behavioural_objectives.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/wurumafideperi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/gba_bois_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/java_string_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/xuzomavumufojebaravujeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/ethical_hacking_and_cyber_security_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/sales_administrator_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/zejatabelidovelovimemi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c3.bin
9bdea1fee29eb6e1c5dfda74a19c4703a69fa6b8af2584c449a00f85a2d15f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C3 5448 bytes
font_01_sfnt_off00006c33.bin
6e6d2fc573cd426358dbb59f5c965ca7fa5fb1f35ef224ceebeca8796c25c7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 12208 bytes

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