Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8a204c319fdb1b…

MALICIOUS

PDF

67.0 KB Created: 2020-08-07 15:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc869cceb6cfc9d44d60d60cf6f53cda SHA-1: adfe0d462dc2c14250635bb1fa7434fb253e12cf SHA-256: 5d8a204c319fdb1b678648485ff882b9c3a330d73ee0dd68bf6ffec6d587e1a3
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=agile+scrum+training+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.cc/pify?keyword=agile+scrum+training+pdf
    • http://files.enhanceosteopathy.com.au/uploads/1/3/1/4/131453194/vetaliwaker.pdf
    • http://files.carsoncitylawn.com/uploads/1/3/1/4/131409200/7616095.pdf
    • http://gunuk.womens4miler.org/uploads/1/3/0/8/130815017/xetikozaji.pdf
    • http://files.jewellerybyjody.com/uploads/1/3/1/6/131606291/tixomora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/zedonisimomifipifito.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/nafabaxidasoviloriraj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/2898915881.pdf
    • https://cdn.shopify.com/s/files/1/0432/2643/1652/files/letter_a_worksheets_preschool.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0438/3634/2434/files/tafazad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/87550154354.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8238/files/39200266326.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/zuvanemovinoxubexirasib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/achievement_test_definition.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab81.bin
58a422d4676a05940a23d48599088c224011813a7870fa28ecf050daf3e38698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB81 5236 bytes
font_01_sfnt_off0000bd2b.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2B 6068 bytes
font_02_sfnt_off0000ccdc.bin
da6ccff791271e69bfe1756ca05fa12b8c8585dc71a6ed6b7659fbc630417e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDC 10420 bytes
font_03_sfnt_off0000f075.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 4324 bytes

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