Malicious PDF — malware analysis report

Static analysis result for SHA-256 2181e587b3d494c8…

MALICIOUS

PDF

42.1 KB Created: 2020-10-24 18:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a084cd413cdc5d62896179bb1fee5d7 SHA-1: f6b6239617caa75878e4c607cfb54ce64c21c5d2 SHA-256: 2181e587b3d494c887769d334939c38e13bee2165027143ca56e5a32b6ab7bcf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to benign content, but one critical link redirects to known malicious infrastructure. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/aws?keyword=native+american+flute+songs+pdf, which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/aws?keyword=native+american+flute+songs+pdf
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5f915dfc7c6ed.pdf
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f89a703c679d.pdf
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8c85e9245e1.pdf
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f8e07944dcda.pdf
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f8d0db11e1f8.pdf
    • https://cdn-cms.f-static.net/uploads/4404515/normal_5f93df8953951.pdf
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f8bbac38115e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/minaxigevani/tecnicas_y_procedimientos_de_auditoria_financiera.pdf
    • https://s3.amazonaws.com/zetare/candlesticks_analysis.pdf
    • https://s3.amazonaws.com/wilugugo/ser_biopsicosocial_definicion.pdf
    • https://s3.amazonaws.com/zetare/educacion_y_neoliberalismo_en_mexico_jaime_ornelas.pdf
    • https://s3.amazonaws.com/tetazino/makalah_obat_analgetik.pdf
    • https://s3.amazonaws.com/kavitokolezub/batch_production_record.pdf
    • https://s3.amazonaws.com/mijedusovineti/sage_accounting_software_training.pdf
    • https://cdn.shopify.com/s/files/1/0498/0647/5426/files/normal_quantile_plot_python.pdf
    • https://cdn.shopify.com/s/files/1/0497/9189/3666/files/chapter_8_great_gatsby.pdf
    • https://cdn.shopify.com/s/files/1/0495/6572/8920/files/81918088886.pdf
    • https://uploads.strikinglycdn.com/files/3e74b79d-b297-4f8f-a725-e99f735709de/9390204164.pdf
    • https://uploads.strikinglycdn.com/files/09d99073-c767-43e0-bd20-5c6840bda9d9/pixatavizekixu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009670.bin
05aaa9c71b107d4abe2163feef94d8ae66ced5278aefe10f134fdd48d09e11a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9670 5388 bytes

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