Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0b06e977f4003c…

MALICIOUS

PDF

110.4 KB Created: 2020-08-06 19:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6440494cc38e6beb234cfe9cb9bf26b6 SHA-1: 806a3527917c0672b8518adf3024c0c03f72c80a SHA-256: 0f0b06e977f4003c9b416979f3a6494f26f9848cbb9519973f0e7bd240c2475c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.ru/pify?keyword=himnario+cantos+espirituales+pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains the same URL as the malicious redirector.

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=himnario+cantos+espirituales+pdf
    • http://files.voorheesrotarydinnerclub.org/uploads/1/3/0/7/130739450/61c06.pdf
    • http://files.graciasgreenhouse.com/uploads/1/3/1/6/131636807/mexetaw_milibone_muvowifivido.pdf
    • http://korikel.johnandmorgana.com/uploads/1/3/1/3/131398560/4568263.pdf
    • http://files.bereangracechurch.com/uploads/1/3/0/9/130969699/dbfb4aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/vebiganidujunalenet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/18065845062.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/13375774081.pdf
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/zumebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/80020925827.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/zosakojamawisubazaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/81871365899.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/ruvutubuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/magia_cabalistica.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/40814251762.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/konegovurolewoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/vizowaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/tavazesopeja.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_off000170a6.bin
47ad349411f8b7087c862544edbc4df47391711226da32b4e08e0af299644642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170A6 5260 bytes
font_01_sfnt_off0001826a.bin
689d7aa5947e7a71822ccdc660dd9af262780c9dc13b84bd190298d7f45ba15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1826A 12524 bytes

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