Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d923a29da571bb…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 18:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f62294f42ae6aaf7dbee5758d2f2a678 SHA-1: ccc922737f2deb840adef52053c2338bca5b2f60 SHA-256: 02d923a29da571bb7d7fa16af90478d72696c29e501e790241f8eec1fc380620
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially corrupted, contains the target URL and text related to medical guidelines, suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify-hosted PDFs, indicating a potential link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a phishing or redirection attempt.

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=kdigo+blood+pressure+guidelines+2012
    • http://files.susanmiillerart.com/uploads/1/3/2/6/132681891/6310780.pdf
    • http://files.startupjumpers.com/uploads/1/3/2/6/132682851/1ffe05c28aaa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/74289939788.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/obstructive_sleep_apnea_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/juxezeroxusure.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/90993140491.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/89185403842.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/3967510323.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/88749130448.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/mamoxefubosegiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/jexuremu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/36367731299.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eaa.bin
3f9888e22197b03d0ab33dc2bdc548c65bdefafdba799f0bbb439c12976c2f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 5156 bytes
font_01_sfnt_off0000803d.bin
5d87ce040fc5d5aff307e861472c185ee99d8f9bbf44d258eac7d933be4e5132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 10476 bytes
font_02_sfnt_off0000a40b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA40B 4324 bytes

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