Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3bb4fcb4757a74…

MALICIOUS

PDF

72.2 KB Created: 2020-10-30 15:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 446f70e8f438a0edaf81d5e7ba0c8d4c SHA-1: 1b007ae33f645dcbde99d068152e73150a49793c SHA-256: 2a3bb4fcb4757a7456bac6ab9b8ce081287599aec3a2e9197c17f9468f8eae7e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ttraff.link/123?keyword=3rd+grade+rocks+banner, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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.link/123?keyword=3rd+grade+rocks+banner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f9450399925e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f976e0e09f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f983568e3182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f8b97c17ce39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f925783d8150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0329/5736/6463/files/lactaid_fast_act_chewables.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/drishti_magazine_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/introduction_topographic_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6750/1465/files/editura_art_manuale_digitale_clasa_6.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/basic_engineering_drawing_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/karalowodoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037656ee-1267-4eb1-96cc-58215e0d7a1d/35902805518.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/xenepitelaje.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/youre_beautiful_lyrics_one_direction.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB379 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000c36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36F 5348 bytes
SHA-256: a68e19bc93f6893253cc3a65391092d8cfa3a5e9048fe94364e0a8eb10eb8401
font_02_sfnt_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 12028 bytes
SHA-256: ebf8c3d5d2b7f28272ff54c44bfd20ca88a21d8e13cb17f95c99b26f7ef2f295
font_03_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 16064 bytes
SHA-256: 14b224d3b4bf2392078a68c325cd31a6b7cc494564d2dc5baf5fdffd53fd1eb5

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