Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fab74c2f6a0173…

MALICIOUS

PDF

37.1 KB Created: 2020-11-01 09:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d81ae71542df4d726a78f0e82e415db SHA-1: 9ae35ad6755543a6ce6b8e022dbf356ad22d38f7 SHA-256: 25fab74c2f6a0173fedea51e393320b5ac697d951262ff2fe966a0d1ade9ad17
94 Risk Score

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 'https://gettraff.ru/123?keyword=tabla+de+medidas+en+pulgadas+y+mm'. The document body, though heavily obfuscated, also contains this URL. The presence of multiple embedded URLs, including one pointing to potentially malicious infrastructure, 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://gettraff.ru/123?keyword=tabla+de+medidas+en+pulgadas+y+mm In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1d46e8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f911fff5470c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_5f958112d8d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f8fe1472b1f6.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/7101885.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/41e47132-7394-4096-a98c-eb71c9e09d38/40843509806.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/xibunipodasawemagiwulitag.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/exemple_de_cahier_des_charges.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/tapuwalovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5650/3205/files/rusty_lake_paradox_full_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82a50e2-f156-4a33-a1b6-9a32a5de8519/kemajagidulup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3657/4364/files/15827736943.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_off00004bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDA 5372 bytes
SHA-256: 9571df9e5570eee3adb0bd41e0db24bf8780b792d1fb52a7ad744eaad0a00157
font_01_sfnt_off00005e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 13148 bytes
SHA-256: c0ad264777b52b44324eca477efd329bb62dbb371656a670277a80d6ee63d590