Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a1d052c1edba0f…

MALICIOUS

PDF

51.0 KB Created: 2020-08-30 04:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0da3ea97033a611b98a50ddeb433f58 SHA-1: 8d293ff1530bce3de8a619a3ad9c9147345dde86 SHA-256: f8a1d052c1edba0fdd8d37f100b1945dd5f00a76453ca6c8245a59a680663868
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.com/wix?keyword=iso+17025+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to trick the user into clicking the link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=iso+17025+pdf
    • https://static.usrfiles.com/ugd/b8c837_b508ac2e86d046f5b0078f3fef4526a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ac3c43eabc7466497d2b29eb1063d4c.pdf
    • https://static.usrfiles.com/ugd/c7a620_a8acbc9a57064e159cde87aec879227c.pdf
    • https://static.usrfiles.com/ugd/b8c837_404adcd3ec914b3bad63c6b2875a2582.pdf
    • https://static.usrfiles.com/ugd/599026_bf25d07e34884cc09638b16f5f78e48b.pdf
    • https://static.usrfiles.com/ugd/e6092c_44900ce4b9a04fa082ab0933c88b14ab.pdf
    • https://static.usrfiles.com/ugd/7f16bd_f585955ecc634f81b075b92958caf5a3.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_d259727d5a7b4fb099a30d846d60d68c.pdf
    • https://static.usrfiles.com/ugd/5ed537_e96ae35793aa46b2963b721d54ee561a.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5157/files/sedagot.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8504/files/uso_de_mayusculas_ejercicios_para_imprimir.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_off00008b12.bin
cc474910fc9085cdfb8b9f58cc44937006942435271bb94f29d6f29ab93edcc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B12 5164 bytes
font_01_sfnt_off00009cd1.bin
e825db43dc1b4db0badedb0bbc4af71dd3fb92080f4e8a66b85f5cead84ed32d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD1 10884 bytes

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