Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ba444bd32ff41a…

MALICIOUS

PDF

53.2 KB Created: 2020-08-01 22:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c5282ea629e5837412e2d5bc46662f0 SHA-1: 2fd6a2ae8f444b2c436701b2dd61a5c27ff1f5b4 SHA-256: 11ba444bd32ff41af8b1c28dd9794518621eadfd2ad2e32e84bf133c77a3f3d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used to create link farms for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=seven+deadly+sin+lust', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting an attempt to lure users to malicious infrastructure.

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=seven+deadly+sin+lust
    • http://files.wesleycollegecollective.com/uploads/1/3/0/8/130813906/zezuxitamepofe-kegoniguwufoxe-jokojevakilu.pdf
    • http://files.reflexologytampabay.com/uploads/1/3/1/6/131636990/xumefesazudobo.pdf
    • http://files.bigpowergame.com/uploads/1/3/2/8/132814024/tudiguvexit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/vesamuzofoxadikedifowunab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/wezuwisedajetunenola.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/75491028395.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/44696036251.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/sasotumumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/91217183212.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/14088069566.pdf
    • https://cdn.shopify.com/s/files/1/0431/9041/9620/files/61467649191.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/wigiwinifitirobepuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/11386454643.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/75220461635.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_off0000925d.bin
74963b9e9e1481010c01b40ca00d185e7be79a55045a66412a12f1a1a2421797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 4988 bytes
font_01_sfnt_off0000a374.bin
2c8f755aa84088502993ab50ae8c9ac66737b36e3d500f76d7690228a26e0ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA374 10668 bytes

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