Malicious PDF — malware analysis report

Static analysis result for SHA-256 561eab8461d02b88…

MALICIOUS

PDF

61.6 KB Created: 2020-08-06 16:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9233be58ea7be818f6875303b18604b SHA-1: 120077d9eeca49801d5f309b48b5849dc58cfe29 SHA-256: 561eab8461d02b889089c2caf40497130debb65112260ef723a8edb09c994ab5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that is disguised as a legitimate document. The link leads to 'ttraff.ru', which is known for hosting malicious content. The document body, though heavily obfuscated, contains the URL and text that attempts to lure the user into clicking it. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic.

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.ru/pify?keyword=business+process+reengineering+articles+pdf
    • http://files.greenfieldiowapubliclibrary.com/uploads/1/3/1/4/131438211/b541ff0.pdf
    • http://files.mastastringcamps.com/uploads/1/3/1/3/131383512/monimuze.pdf
    • http://files.easeandexcel.co.uk/uploads/1/3/0/9/130969580/varanarokezevagetar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/polizas.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/63056206176.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/904397856.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/ditavafibagudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/97429105082.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/download_textbooks_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/bacilos_gram_negativos_no_fermentadores.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/95438666393.pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3284/files/90467758694.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/xuranajotusopoxaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/calculus_ii_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/juleziruneratarimoluvik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.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_off0000b0d7.bin
eae3223681fdbaa87bc3edd4ee400c963cdfbc0b84dc4a911cd753c153741c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 5372 bytes
font_01_sfnt_off0000c332.bin
4d3dec73fc2b36dd51ec6d8445796ba2fc1d76f670887b96064f1a5fe784e5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC332 11176 bytes

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