Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7aa4b8ff8c97c46…

MALICIOUS

PDF

42.4 KB Created: 2020-09-30 17:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 01cc47cda6c1dbde664c4944f8ff8efe SHA-1: a5e066a58c5f8b8cfaa996241b91e6f40cfd530f SHA-256: f7aa4b8ff8c97c46fc50b0b5ed1d009dd0616dbe2ba6e7a90bef9124e9db1008
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to deliver a payload. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs further supports a phishing or redirection attack. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to lure the user to a compromised site.

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.
  • 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://gettraff.ru/strik?keyword=antibiotic+resistance+pdf+file In PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/91522559289.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/wubazarerarasipuzuviwa.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/92372570431.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/liferebenader.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/77187448322.pdfIn PDF document text
    • http://tudama.chillingthemost.com/uploads/1/3/1/3/131383483/nujijojelakivur.pdfIn PDF document text
    • http://walew.herzdesign.com/uploads/1/3/1/8/131856476/ad2b2e2.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/xubet.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/lixevawof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 5276 bytes
SHA-256: 515b9713088075d8e27bd3bc2c6013c260d9b0d2105c45d61cc5f633ed5bcadc
font_01_sfnt_off00007b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B37 10052 bytes
SHA-256: 1944120c00caefd4b063e834da5c50c40b7489a1edd81f88d2d40978d42c32ca

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