Malicious PDF — malware analysis report

Static analysis result for SHA-256 20711c8ddd3dde27…

MALICIOUS

PDF

43.2 KB Created: 2020-10-30 07:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46204ce19f325297965ca932fcdb210a SHA-1: 426755b36022368c411e5a84dcfdd3828f7de46a SHA-256: 20711c8ddd3dde275b2bd7a6e93fdd428c0ec19c572ef621eaa5e9c4d6d8ae89
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 heuristic firing indicating it links to known malicious redirector infrastructure, specifically the URL https://ttraff.me/123?keyword=what+time+is+20%253A30. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious link suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

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.me/123?keyword=what+time+is+20%253A30 In PDF document text
    • https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/a0d63a1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5f8efa3f6a1e3.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f94db0b77794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f951ea12cac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f91d67c651a1.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/1/0485/0250/5633/files/jukola.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/89533475323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae8e03b-1d09-4acc-bd75-94564d0c676e/nivaxavakevugametaguguje.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/silent_letters_worksheets.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5412 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off00005e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 5300 bytes
SHA-256: dd8498d1b205545b54aba4572348922dd766f481fe799fd930133d5b8c8756c9
font_02_sfnt_off00007040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off00007ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 10656 bytes
SHA-256: 72e054c3ca1492d0504faa13751051dd16043b189a4d482258f1a3ffbc414f5b

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