Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d244f4d5e28d49…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 20:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95ba8b415f946e4fe938c87f8b856e02 SHA-1: b2e473d87669d439f06813064d2208119cd087bb SHA-256: 12d244f4d5e28d492ef6e6dcf3999c62b3258e2ea7a4525e993d174036616da1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.com/pify?keyword=mehndi+designs+video++bestwap', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors indicates a malicious intent to redirect users to 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.com/pify?keyword=mehndi+designs+video++bestwap
    • http://files.kristyleighaviation.com/uploads/1/3/1/3/131379443/livumep.pdf
    • http://vovanif.heritagehighschooldance.com/uploads/1/3/1/3/131384169/f7e303b.pdf
    • http://baxorazan.darleyprimary.vic.edu.au/uploads/1/3/1/6/131606407/zigulibiwomuti.pdf
    • http://files.stevensmithauthor.com/uploads/1/3/1/4/131408062/7543855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/piviriluzuzorita.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/xosebuken.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/48373156353.pdf
    • https://cdn.shopify.com/s/files/1/0439/1292/1256/files/dusotewudefamoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/centricity_pm_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/banking_awareness_july_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/pedezipalirigerupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1519/files/calcium_restricted_diet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/accordance_shelly_crane_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/consumer_reports_best_used_suv_under_20000.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/paulo_coelho_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/search_google_drive.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dfb.bin
9823d8dd3d2e460dd239de6bc94b040f30af31a81a3fd6dc965bca8f7c5c5475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFB 5388 bytes
font_01_sfnt_off00008068.bin
e4504d06344efb4f492ff5cb13840b4d78d4525318e0b1c6abba304dd3a64f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8068 10084 bytes
font_02_sfnt_off0000a319.bin
451a97a76e1cd188b335db18aa59b090969584b10ed985ec5dcca0b5cdb1d7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA319 16660 bytes

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