Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73a0aa1657c0bf4…

MALICIOUS

PDF

46.2 KB Created: 2020-10-31 10:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a710ef915d37f7d9507c15b9c58126ca SHA-1: 306ef4daeb096203913c6c7c2759fe9f25fb5c28 SHA-256: f73a0aa1657c0bf48b6edec7585fb216ef6925e6cca0a573b19620c510414773
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/123?keyword=secondary+growth+restriction'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or further malware delivery.

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.club/123?keyword=secondary+growth+restriction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5f961e435dc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f96d62ec9600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_5f95aa6543a55.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/5715567.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/wexalewanalerim_dezozevusawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8d9b3cdcc92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f88a87adc9f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/49019325962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9020085c-c41b-4ee1-952f-1757fa70c9e8/puvinugaxawukizokevopuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d774ee0a-9d6e-4a09-84f4-4c86d810a0f8/4853641409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cece58-297f-4c7f-89b6-fd5da561be5f/daily_oral_language_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5196/9443/files/vipibanipozasedodap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3166/6074/files/form_i_130_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/ontario_grade_12_english_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3c0085-2376-4dfa-b1e3-d4ac4de0c478/lamisofunimudidat.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 5464 bytes
SHA-256: b771fd739b11017073a01a9e868a02dc3c14273406130e6aebe494e86fe730e0
font_01_sfnt_off000088ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EE 10412 bytes
SHA-256: 254c672770f759ed359e8b22e6a3e3b2a584588299be51c13a7a8615a8f8ee64

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