Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99a6b7b84ca5bb9…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 01:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05544a7dbe95670b2b1676f53cff22c1 SHA-1: 1a1a363e4e9b25c585238942344cc2b0dd100360 SHA-256: d99a6b7b84ca5bb953b22b502ca765dbe48923854440879f48d8390a05123e07
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.com/wb?keyword=realism%20and%20humanitarian%20intervention%20pdf, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=realism%20and%20humanitarian%20intervention%20pdf
    • http://files.worldprayingcommunity.com/uploads/1/3/1/6/131636808/4993932.pdf
    • http://files.mtadamshoney.com/uploads/1/3/0/7/130776180/6067542.pdf
    • http://files.johnjzelenski.com/uploads/1/3/2/7/132740580/mutejexadapuxodan.pdf
    • http://gufaso.worldheartsfairtrade.net/uploads/1/3/1/8/131871721/joserobulisove.pdf
    • http://fegopaw.lagrangehorse.com/uploads/1/3/1/4/131437792/juxovovana-gotabive.pdf
    • https://cdn.shopify.com/s/files/1/0439/2845/3288/files/sibug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/67768954626.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/eicar_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/mivodekilijitulijorima.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/temavesa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/92664581346.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/14380280374.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/goku_vs_android_13_spirit_bomb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/mechanics_of_materials_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/guwezanupunepopibaperoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/52102873020.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_off00006ca9.bin
fb36a30d90817e363231b16cbcbc7eb2ef23081094f4befd19fd65b2788585a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 5348 bytes
font_01_sfnt_off00007eb0.bin
6c91cf3e7b33cbb747b4caf35a68f5cdedce8ae7b9999b9bb795a720054ceb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB0 10336 bytes

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