Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cd342eff2a5b65…

MALICIOUS

PDF

36.5 KB Created: 2020-09-02 02:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0bb1048a0c7c775155fb25ad44f9d79 SHA-1: 2dac80246dff10e69a6f9fc7e466ab609f1e6d95 SHA-256: 09cd342eff2a5b65d6965053d4ec7c6ffd7e22f3344e3edb33a42d100e889c22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector URL known to host malicious content. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

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.com/wix?keyword=esma+mifir+q%2526+a+transaction+reporting
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/auto_format_code_in_vscode.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/jixawevotewigiwetuvoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6497/files/24649025280.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/acoustic_guitar_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/cahills_vs_vespers_book_4_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/budget_planner_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/5571/4199/files/potluck_food_labels_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/19995058360.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/urticaria_idioptica_crnica.pdf
    • https://static.usrfiles.com/ugd/26481d_2c9f7cf716ad44b9a4dd894b2a98e3e9.pdf
    • https://static.usrfiles.com/ugd/5cd33b_0d9eaaacd2fd4cf0ac4840a23a0fb1b6.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_ce58c0b6dff049269efc6e4280fcd81a.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_e07d4a8bcd1c47bb9e4ce3f9b53c19ed.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/jobebaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/bangladeshi_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3194/3585/files/41615583539.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/rinupipudikusexamalibevup.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_off0000512b.bin
720615129475a401d0465461b09420e9bb8207f5f195d7d34f7628f75cece4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512B 4964 bytes
font_01_sfnt_off000061fb.bin
1f07db1687a0524e689b5a2c599dbdca3690e8f5027afabf2ad47eed36c5b7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 10544 bytes

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