Malicious PDF — malware analysis report

Static analysis result for SHA-256 0297b87cc2390bc4…

MALICIOUS

PDF

69.3 KB Created: 2020-08-26 18:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe539ac222baefa6d2850ee22e195de SHA-1: 74e36f61387dc478b842a2e0557e413e77f690ba SHA-256: 0297b87cc2390bc4234f18fd01a0c6fa82c236ea4bb20c0a6e9d42ca4a485132
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.com'. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of malicious links suggests an attempt to redirect users to a compromised site, 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/pify?keyword=detective+conan+movie+2016
    • http://files.wlfoundation.net/uploads/1/3/0/9/130969974/limazed-mojevo-sinomajajatib-gosigug.pdf
    • http://files.dalton-watches.com/uploads/1/3/1/4/131453144/e191e47683f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2305/4501/files/sogizifuvimi.pdf
    • https://cdn.shopify.com/s/files/1/0465/1198/0702/files/information_processing_letters_latex_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/83662756860.pdf
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/26748183963.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/zuzepaxujanabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/sapamilovup.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/48220068338.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/kptcl_recruitment_2020_notification.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/mubepurow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/24999834444.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d8c.bin
4e30c249eb8f99ee63b76b73ba96c178fe63f50e354a2943f3b6ea82bdf2df07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 19436 bytes
font_01_sfnt_off0000bbf7.bin
ad4d02b6b1df409bbc033f8cf8871cf17c27413faf6d468857fab3e2afe49dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF7 5180 bytes
font_02_sfnt_off0000cd92.bin
b2dd27ee78e585f532ac6a5ac75bca28a09bad7bf4cdc8b49f27683c594553fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD92 10756 bytes
font_03_sfnt_off0000f299.bin
5c485768518a5ee43323212f3e9837058db5dfc2148a5de0a32f39379138fb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 16164 bytes

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