Malicious PDF — malware analysis report

Static analysis result for SHA-256 06114c3621ee309f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-07 04:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5466487598cc6bea697d5b2c6c944e0 SHA-1: 1d630228ef8ae7df3a211d4427a16702d78889d9 SHA-256: 06114c3621ee309f0d8a7b15df25363e6cba5df2edcac1682e3bb85779260c43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are to SEO-optimized PDF hosting sites, but one critical link redirects to 'ttraff.cc', known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a book title and the malicious URL, suggesting a lure for users seeking free content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.cc/pify?keyword=discovering+behavioral+neuroscience+4th+edition+pdf
    • http://files.friendoffaith.org/uploads/1/3/0/8/130814346/bevifax-jobosomegikek-kuxipizelezifem-limejevat.pdf
    • http://files.allstudentsallstandards.org/uploads/1/3/2/7/132710683/guxowaxifurigoz.pdf
    • http://files.hgbrga.com/uploads/1/3/1/3/131381540/xasowajuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/gcse_english_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/vomezovekumawoguloz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/54720655995.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/wakupegiwovenuvevewomiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/poligedimorajem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/bihar_police_si_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/simple_english_communication.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/favejidujedimudosi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/mega_douser_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/paxafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/fexewutiwexetuforeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/2013_chevy_cruze_repair_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000487b.bin
08317576f75da75acf1c4b574efcdbeed1f9556200bf52720ec9aae2d1b3bb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x487B 5704 bytes
font_01_sfnt_off00005bf4.bin
21c191c9cd6026d898df4262c534c3d5f677dee4388fdabdd6148ed79761c625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 9916 bytes

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