Malicious PDF — malware analysis report

Static analysis result for SHA-256 79450db24d85515a…

MALICIOUS

PDF

48.2 KB Created: 2020-09-16 20:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a7b82155e91709547a76da8f2a030a SHA-1: c3c50ca8d25ac12ace7f5b625f377ed18b0c36dc SHA-256: 79450db24d85515aaacb8bae62d46cd5acd6886733fac7809695bb505ea4d295
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=infinite+warfare+campaign+guide'. This indicates a social engineering attempt to lure the user to a malicious site. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, consistent with a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=infinite+warfare+campaign+guide
    • http://renep.lgbtmalaysia.com/uploads/1/3/1/4/131438617/3ac867ea808241e.pdf
    • http://files.star-keys.co.uk/uploads/1/3/1/4/131408280/8984643.pdf
    • http://wadibisan.patelp.com/uploads/1/3/1/4/131454436/9968388.pdf
    • http://milaronov.jillsolomonmft.com/uploads/1/3/1/3/131382078/7d9165ee06a62.pdf
    • http://files.spec22sales.com/uploads/1/3/0/9/130969045/2195511.pdf
    • https://04c2d68b-2ae6-4acf-a806-3c63b91c0115.filesusr.com/ugd/405339_47bf1681105c467c81f3333e238cedda.pdf?index=true
    • https://a48decba-3d77-4ed9-9de9-58425853cd21.filesusr.com/ugd/145364_a81c93d257c64d1581e979be747825f0.pdf?index=true
    • https://e640de1b-085f-4690-b499-76c274e3debb.filesusr.com/ugd/0cd3a8_de6d1b85830f41b080b3a1a00c79822f.pdf?index=true
    • https://06662103-dafe-4aaf-9b0c-1ff2e660b8bb.filesusr.com/ugd/bca722_f7bf57b58ac64e39984c12c8fafba6d7.pdf?index=true
    • https://eff80e82-3524-4eb8-9d87-3790af72a65c.filesusr.com/ugd/8acad3_a7dae00f78bf4ba49e4cbbb6c01cddf9.pdf?index=true
    • https://c1da7b09-b021-4375-9b16-3a948d9ab124.filesusr.com/ugd/740d8c_807804dfe110428a9dd1877155763413.pdf?index=true
    • https://74b4bab1-d51d-402f-a748-4f613d8526d7.filesusr.com/ugd/cfbfd2_6d05ca68a8174987b7b135bc3da8180b.pdf?index=true
    • https://d13eea70-82f0-4870-a3d9-36f1163e51c8.filesusr.com/ugd/b42fd6_cb7b33c61d7c4c6093bd34bf29be9da9.pdf?index=true
    • https://8e5b5b08-2a4d-4ea1-8a0d-a65dd89b3c2a.filesusr.com/ugd/1e557c_d7905b02499841fab1cf266c1ab9c0bc.pdf?index=true
    • https://389e5245-6fed-4792-815a-26ba0c1e4fbf.filesusr.com/ugd/6f5f23_d4476a58aae841dbb591f0e4ec1e0540.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/misfits_saturday_night.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/duxavojowisegojanejobivow.pdf
    • https://cdn.shopify.com/s/files/1/0464/2999/5160/files/mopofisusutepesarozigil.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/salary_expectation_answer_quora.pdf
    • https://cdn.shopify.com/s/files/1/0433/5353/8710/files/anthem_blue_cross_pcp_change_form.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cfa.bin
73af127aeebe2a06d6d61019ef681c661e11ce081e79ce3681053eed4bf434c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 5292 bytes
font_01_sfnt_off00008efe.bin
4e4ba3294ca64e957105777562eb804825707f15b704ab375a5386eabfa35a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 10756 bytes

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