Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c2c833d38f6cc…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 00:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f968e7942d1a5164da491f0c0cf7f4f3 SHA-1: 0f266e9c165258aea05eb73ffdcb94cde4f69fe9 SHA-256: ce1c2c833d38f6ccf882728e2160ea4aa61f87ea6da319d84e8217d12b593641
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious content, as indicated by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=angular+8+template+variable, which is flagged as malicious. The presence of numerous other PDF links suggests a tactic to broaden the attack surface and potentially evade detection.

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=angular+8+template+variable
    • http://files.radleyhorton.com/uploads/1/3/2/8/132815063/wiwol.pdf
    • http://fodotuxav.tuiridgeaustralianlabradoodlesnz.com/uploads/1/3/1/3/131398455/gudetigij-sevajufuxiweter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/meteorology_today_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/lepizufamofuxojifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/93600627689.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/99923340171.pdf
    • https://cdn.shopify.com/s/files/1/0439/0502/4168/files/8491261840.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/edgar_allan_poe_el_gato_negro_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/15425629476.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069dc.bin
d5a8f171b8fb7eaa3391e9c26b3aa98ea449ff4890ce15a3de8178eba396d8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 5344 bytes
font_01_sfnt_off00007bf3.bin
a452ca12369167e4591dabc9143f2071fa8f2fdeb71c6bdc414160eee7b5a168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF3 11352 bytes

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