Malicious PDF — malware analysis report

Static analysis result for SHA-256 7718e138c283298e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 00:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e78488740e75e174f6f03c869ee9d32 SHA-1: 892fb7c9e42fa29f7c02329d1a6eaceee9fc8c1b SHA-256: 7718e138c283298e4bd3b93979a9c896967bf9c5cc52eaade4300c37ba445a0b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known to host malicious content. The document body and heuristics indicate a link farm strategy, attempting to trick users into visiting potentially harmful sites under the guise of software downloads. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure.

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=apache+tomcat+6+64+bit+free
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdf
    • http://kijibew.fhpsc.ca/uploads/1/3/1/6/131637036/vovubepa.pdf
    • http://files.okusag.com/uploads/1/3/1/3/131379990/jadezoj.pdf
    • http://files.cbmaspeth.com/uploads/1/3/0/7/130775260/lolinexikivogu-sutuzefowegerop-bilem.pdf
    • http://files.daniellelbeattymoodyphd.org/uploads/1/3/0/8/130815277/5483628.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/waxonogibokejifutorerede.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/juvasuvilafimeti.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/livro_adriana_sant_anna.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/apache_spark_scala_interview_questions_shyam_mallesh_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/96402497739.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/best_sites_to_movies_on_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/95271973229.pdf
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/13500759381.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/6802166825.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/advanced_javascript_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0454/6409/2822/files/xowobifemi.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_off00005d18.bin
7b10d60415bb674c76c774ddad0d4ff0347e894a4c2e42459fd838146e1d2fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D18 5416 bytes
font_01_sfnt_off00006f63.bin
b398dc23053b09623eaba014339f0d77b0135a4e56f78f5935657adb7d24e175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F63 9912 bytes

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