Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeedc81dceb1398f…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 08:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c44872f0161975b38e876006b3a4cdea SHA-1: 83375ed2aad09ed342821b7f829c755d8f6cb880 SHA-256: aeedc81dceb1398fe9b30ff603eb4837ba2b3a5d78f72be4afac0f64daf99e91
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL is 'https://ttraff.com/pify?keyword=gastroenteritis+akut+pada+dewasa+pdf', which likely serves as a lure to a malicious site.

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/pify?keyword=gastroenteritis+akut+pada+dewasa+pdf
    • http://files.thinkhairsalonstudio.com/uploads/1/3/0/9/130969754/3652262.pdf
    • http://files.pottawattamiecountydemocrats.com/uploads/1/3/0/9/130969291/ronukokoretamapabim.pdf
    • http://files.melissadkim.com/uploads/1/3/1/8/131872087/f305fbadd7.pdf
    • http://files.significanthealing.com/uploads/1/3/0/7/130739916/418075.pdf
    • http://files.plumcanyonpta.com/uploads/1/3/2/7/132710678/8874040.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/lufewosaritexeriwemigagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/chevelle_assembly_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/mabiziv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5788/files/temosoboziwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/57895402296.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/58104576794.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/nosuzamigeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/artikel_tentang_bahaya_narkoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/61147897605.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/midetorisameruzuvak.pdf
    • https://cdn.shopify.com/s/files/1/0447/9749/3405/files/cabala_judaica_portugues.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_off00006206.bin
86828e0b07dfb9a296ddb549263f84d37b70c009ef49537622874485cb78e22e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 5192 bytes
font_01_sfnt_off000073d9.bin
de814193fca32eb1ceba9353b57fc392b5a9d98e4710bb54d06ec763cd664157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 9752 bytes

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