Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e25bdfdf9c608ae…

MALICIOUS

PDF

47.6 KB Created: 2020-08-05 08:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7e4336065b9ac3aef153089c1f1d30 SHA-1: 31801760c308f44b8b5f532d7ee06bd8d09d9056 SHA-256: 3e25bdfdf9c608ae1dff7eb05e3b9ae2292bb4ff36c67e66e8eac6b08a8ecbe0
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=numerologia+y+cabala+pdf+gratis', suggesting a lure for users seeking free PDF content. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking for malicious 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=numerologia+y+cabala+pdf+gratis
    • http://files.animalacupuncture.org/uploads/1/3/2/7/132710621/kulimaxogo.pdf
    • http://files.kylespestsolution.com/uploads/1/3/1/6/131636655/4254434.pdf
    • http://files.sunsaluteretreats.com/uploads/1/3/1/8/131856195/9010401.pdf
    • http://files.patriotplayhouse.org/uploads/1/3/1/0/131071253/ginap.pdf
    • http://files.crystalclearesthetics.com/uploads/1/3/0/7/130775647/4893381.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/87528710565.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/brevetti_stendalto_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/photolithography_steps.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/47447466987.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/antioxidant_activity_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/azusa_street_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/tutapop.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/47678177140.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/tumokijejuxudonanobifij.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/what_does_enchantment_mean.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/57912010765.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/draconomicon_metallic_dragons.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/sikizunezerodowupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/turefora.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_off00007a1b.bin
99063b7c5429efdf4d402e87df70039803d76a51bbfe40a076a40b40b4ac422a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1B 5688 bytes
font_01_sfnt_off00008d71.bin
bd044d7dd836af749daf96fad06d0e6077b26eb6b1469ed9771cca11c0556308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D71 10404 bytes

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