Malicious PDF — malware analysis report

Static analysis result for SHA-256 b056ed143aff334b…

MALICIOUS

PDF

57.0 KB Created: 2020-11-05 19:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c44d449d91746ad1c670723fe4f2e594 SHA-1: 4d91beba894a63d8c67ad38c7a7d523c70d1bdc8 SHA-256: b056ed143aff334b1c2f125fcf9141ed1cb0eefd2d09cb8aecce7466cc75dd6d
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, specifically pointing to 'https://gettraff.ru/123?keyword=schedule+of+values+template+pdf'. The ML classifier also strongly flagged this PDF as malicious. The embedded link is designed to lure the user to a potentially harmful website, 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=schedule+of+values+template+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f98643727f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f99b4bc224f7.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/2545999.pdfIn PDF document text
    • https://tadafami.weebly.com/uploads/1/3/4/3/134386911/028704bcc6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_5f9c444ba9693.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/safago/20317973594.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/all_aarti_sangrah_in_marathi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3cb24d3-df9d-47e4-bb97-fec7782e7b36/44519084975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d713bfe5-2ae2-4b17-beac-9a6a3f9c2ae5/77113258683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf90cf4a-bed8-44d9-a3c4-e40f0461ff3f/molamojaguguziwunosokobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ffc08-34b5-4242-8051-1b11c9a9e05c/61854384863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda8416f-b17a-4851-93fc-29d8cc4d71f1/gafutalakisibivodufinenoz.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_off0000bd6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBD6D 17584 bytes
SHA-256: 297fa3fbf344c7badf4b83e5dc409bf6d353e82e75cb600d6800901cc7b458f8
font_00_sfnt_off000086dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DD 5464 bytes
SHA-256: 589d30362cc72a2fb79833bde7aa86d2e81a40f0f060bc049be423b46a82f0b1
font_01_sfnt_off0000995a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995A 10496 bytes
SHA-256: 689990351555ec0e07658597adec71758f5a3356c274b9c1a4a04c66ffba56d4

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