Malicious PDF — malware analysis report

Static analysis result for SHA-256 741199a05afce4b9…

MALICIOUS

PDF

38.4 KB Created: 2020-08-11 23:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4f5222f511f4f4f28d4be39a4f3393 SHA-1: c1fdab6759d42e2395dff3ae2e5ae8c05dfbe03d SHA-256: 741199a05afce4b9eb9e645f237c21af4bd0f80e88ee9cef7bcd662055cd3ca2
154 Risk Score

Malware Insights

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

This PDF file contains a link farm and a redirector to a malicious URL, disguised as a "bridal march piano pdf". The embedded link farm suggests an attempt to manipulate search engine results or distribute content widely, with the primary redirector pointing to a known malicious domain. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent to redirect users to harmful content.

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/pify?keyword=bridal+march+piano+pdf
    • http://files.thecosmicbrain.net/uploads/1/3/1/1/131164159/mokakoloz-lijofodoti-zedotegojome-zagipuw.pdf
    • http://bagis.mollymidi.com/uploads/1/3/1/6/131606758/4432515.pdf
    • http://files.ptfinejewelrydesigns.com/uploads/1/3/2/6/132680932/4c1ae2c0563.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/28044732525.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/37215839168.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/cracking_toefl_ibt_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/86917678734.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/54990015508.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/kilatebipudawaroxisapejut.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/10344744610.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/bopabixokapodugawer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/90202959858.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/business_english_books_for_esl_students.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cce.bin
d290fd5688009128f319315f0466514e3e11092f6bb74ca95d95377d97e20649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CCE 4856 bytes
font_01_sfnt_off00005d0a.bin
732c5dcde31f31b9c439655430c5a3db4e8d0af9fd64c926eead32e7f6e90e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 9892 bytes
font_02_sfnt_off00007ee5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE5 4324 bytes

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