Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d241c1d9b10e39d…

MALICIOUS

PDF

182.5 KB Created: 2020-08-19 07:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b95da9da3303ecf06ea76c0b6e0f4d8 SHA-1: 9e484c33340036928a9b88052720ad702b98c90f SHA-256: 0d241c1d9b10e39d6a70ed836b0c45a011bd153fd35fe34d3d8839e56a47c6b2
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also flagged this PDF with high confidence. The presence of embedded URLs and the ML detection strongly suggest this PDF is designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bsaci+milk+allergy+guidelines
    • http://files.athensprep.org/uploads/1/3/1/3/131380870/vukaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/system_dynamics_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2421/files/kifebumubabimagagepudip.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/11654446407.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/52414021541.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7107/files/network_film_script.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/67804624884.pdf
    • https://cdn.shopify.com/s/files/1/0438/0462/3010/files/goboloperizenureji.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/lavimokatisuzafisiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/82439625393.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/61497969607.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/vejisepimudabuvilokod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/9748936814.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_off0002765e.bin
5c821a0f683fcaf11b1285144c7632a2af36fec09174119e2d74675761897636
pdf-font-stream PDF embedded font (sfnt) at offset 0x2765E 5476 bytes
font_01_sfnt_off000288e3.bin
4eefee75f71559d577c001ab09cb752976cbc5fbaf1133d1bc49f528c11f3de6
pdf-font-stream PDF embedded font (sfnt) at offset 0x288E3 14548 bytes
font_02_sfnt_off0002b739.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B739 16060 bytes