Malicious PDF — malware analysis report

Static analysis result for SHA-256 17595c4e8efe430a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 21:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 363f9a1f7697304e231df11957870d3e SHA-1: 719ab71d7d8159f443134bdec30a1ec5ec5848c4 SHA-256: 17595c4e8efe430a0400cb89652233f694ddc09c20a1665de9c65ee49669defc
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The document body contains a URL that likely serves as the initial lure, redirecting to a malicious site.

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/wix?keyword=ph+definicion+quimica
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/xupalaxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/the_world_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/28309911096.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/paxuwotudalumud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/wasifusogirimigeboli.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/serezegoxotul.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3704/files/febikejebijasumuravedofu.pdf
    • https://static.usrfiles.com/ugd/90423f_2fafff26fa884bdfbfe74b011eade32c.pdf
    • https://static.usrfiles.com/ugd/405339_bf54921c445941acbaa65a66f133acff.pdf
    • https://static.usrfiles.com/ugd/1a89c8_1d32131913774784a91c5c1105e01d64.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef2582c110274be198c972eae91fd6fb.pdf
    • https://static.usrfiles.com/ugd/d4da64_c2e21f34a6c849b7bf1ba4328732b44b.pdf
    • https://static.usrfiles.com/ugd/2074c9_78d53a0390784d60a8326499b07dcd8c.pdf
    • https://static.usrfiles.com/ugd/1f2646_e609760b83df4590b55f2a22c0abae60.pdf
    • https://static.usrfiles.com/ugd/b8c837_246c0046a4ab40f8b875618f3232a841.pdf
    • https://static.usrfiles.com/ugd/ae15ca_cdd184e4e73c4526a79ee688992534f4.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_86a73a655e504edcae02d50f2b06d2fc.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_off00006963.bin
bfafd1982f2c8a41977cb0bfdd4332f36fe11747eb1a98479229c7bffd1acd7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5080 bytes
font_01_sfnt_off00007a7c.bin
eb1eee26faca6bdb3b8e25efcfc22890e12e3d470b9393abe8c6a96a9cee66a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7C 10512 bytes