Malicious PDF — malware analysis report

Static analysis result for SHA-256 9920a032b330438a…

MALICIOUS

PDF

57.0 KB Created: 2020-08-29 18:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98e0a62451ccb20416483d66005e899e SHA-1: 6c4ba15ceda6b635e7272baa1c0f7ef57f857f13 SHA-256: 9920a032b330438a546bea0bac4a7c60256f886d33b1b378d9dd216e1fce4a08
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=12+correctos+para+administracion+de+medicamentos'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient evidence for this assessment.

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=12+correctos+para+administracion+de+medicamentos
    • https://static.usrfiles.com/ugd/b8c837_13a0358859d044d782ac0944d6d449db.pdf
    • https://static.usrfiles.com/ugd/bf650e_67ac142eb2484ca19ca0d9496e671e16.pdf
    • https://static.usrfiles.com/ugd/63d3ad_cf8f3ee18c654f66aa44c9ade6134d87.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0b63bac26bf4b85856eaaa80428c009.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f7b12aec2a4cd1b38058a6166f8b24.pdf
    • https://static.usrfiles.com/ugd/b8c837_4aa50fe820d14e128736a2324d81e37f.pdf
    • https://static.usrfiles.com/ugd/b8c837_59d9d69230334a6b8ca06d00fe49907e.pdf
    • https://static.usrfiles.com/ugd/b8c837_344215e993c5403eb9505e7d16cfb44e.pdf
    • https://static.usrfiles.com/ugd/b8c837_456d002bd15c4264bd5030bdd5c535c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_871ad658586346a9b5ffea189f1e0c97.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cc918520b014589bc44b787b64cfde7.pdf
    • https://static.usrfiles.com/ugd/d162e3_8d938c6db2ea4e13b670309b90566c34.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_off00009130.bin
f24eecde8b39fd12f57543310d5a3fbaff961a42682f128921746f52665b88a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9130 5276 bytes
font_01_sfnt_off0000a2fa.bin
d7a915d9596d9065a32064ff53691d918e15e99b4820913099ad4cea93466912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FA 16556 bytes

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