Malicious PDF — malware analysis report

Static analysis result for SHA-256 6607663ff20fc93a…

MALICIOUS

PDF

37.5 KB Created: 2020-08-01 18:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2306aa759064345dbead71e6e6225ef3 SHA-1: 207e1d86023bf913d2f7ad76ad4d9984bdaec47f SHA-256: 6607663ff20fc93a7dd4849813b1814853a91f6e31d59891c92170129aa37cb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to 'Ubuntu install mpi' and the malicious URL, suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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.ru/pify?keyword=ubuntu+install+mpi
    • http://files.joeyessmaracing.com/uploads/1/3/2/6/132681294/darike_marotetitiji.pdf
    • http://files.mayahabian.com/uploads/1/3/0/8/130815437/mokaputevojok-dikuxomafelaf-gupujeliloso.pdf
    • http://files.engravingstation.com/uploads/1/3/1/4/131453022/36c25e044aa1aa.pdf
    • http://files.nnft.ca/uploads/1/3/1/4/131408250/vekumewixuzek.pdf
    • http://files.donnchadhoconaill.com/uploads/1/3/2/3/132303410/dexovivi_sobedadev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/94204272925.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/kindle_cloud_reader_to.pdf
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/46461300294.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/31278490965.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/kekinegefudil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/zaxemated.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/ladoruvarikepejul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/pejamukosizixifesemoriwoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/96952480864.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/xorijujapavow.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/duzerawawepiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/86746728838.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/vabajunudifibotin.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_off00005605.bin
8ae04c78cdd96509129245a5574032c0743a4bbdc5bee8276ec5b6c90605d4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5605 5000 bytes
font_01_sfnt_off000066fb.bin
641678988ea9758810f3182bb6e62abc7d3e5b9a3c4c8559ad3f5b63b3c9181e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 10068 bytes

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