Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebbbf2033fd2e96…

MALICIOUS

PDF

75.4 KB Created: 2020-11-01 16:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b9bae31b018d3b98d01e7cf024ca3532 SHA-1: ec581dbe6b66f70107257055fa3c879a8bc037a4 SHA-256: 5ebbbf2033fd2e961842423eb7fcdce3be6dc6c1c3ab9cb148eb57757108b50d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a likely phishing or malware delivery attempt.

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://ttraff.com/123?keyword=strong+versus+weak+acids+pogil+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8bf5836ab5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_5f9ae420e9f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f95df41ea785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5f94dc146222d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5f975f9b8fe3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac9e0f0-14f1-452a-a07a-f90d77912dfe/law_and_gospel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9353f485-bcc4-47e6-8d93-17555dab45f5/78258003080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fbc6cc-d0db-4f3c-ad59-65bf11118c38/lifeniwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33580a98-468e-425c-ba06-d51fffd51c34/manobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd303b5-7a1a-4a63-929c-b8e278dbc2c9/49040383480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f44479-5b4a-416d-b770-41e38a1036c7/seporododuduxaloje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d338e77-3a1b-48ed-a65d-851e95922ef1/40653862299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ff27b8-be77-4c2a-bf63-0c7c23ad1cdd/zowibuvibuwizolanezi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/73356920108.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/manual_de_escuela_sabatica_intermediarios_2019.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ec32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEC32 30220 bytes
SHA-256: 7abdcaaa959c02ed636989ce1dbc75d325d621d37c52ae2a907df77a5623d362
font_00_sfnt_off0000b18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18E 5644 bytes
SHA-256: cf28066d0749085b524786f26264547d6ee28017403b21a21a09e79ebd21bc18
font_01_sfnt_off0000c4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F8 11444 bytes
SHA-256: ef1784caf94cb09b130583dfbe5c63a72d80ce5406216abc20140e2e79badfcf

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