Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c3f4bb5d664b49…

MALICIOUS

PDF

69.2 KB Created: 2021-01-16 00:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5aee768849bfde7f6991f95bdf479ca SHA-1: bfaaad53ab3bb2ef555f160a757f96f91afd9098 SHA-256: 36c3f4bb5d664b4979b03c54abc20ca47fcc2e61f7b5946612e56ba08236293f
162 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 'gettraff.ru'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of a malicious URL and the 'SE_DOWNLOAD_BUTTON' heuristic suggest the document's purpose is to trick the user into navigating to a harmful site, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=dearly+departed+play+script
    • https://site-1174761.mozfiles.com/files/1174761/12470521065.pdf
    • https://site-1252473.mozfiles.com/files/1252473/free_spreadsheet_app_for_macbook_air.pdf
    • https://site-1224368.mozfiles.com/files/1224368/rom_android_10_for_note_8.pdf
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fd97574bc547.pdf
    • https://cdn-cms.f-static.net/uploads/4501380/normal_5fbf19a01b250.pdf
    • https://site-1171487.mozfiles.com/files/1171487/excel_2010_vba_copy_cell_format.pdf
    • https://site-1243859.mozfiles.com/files/1243859/1576293.pdf
    • https://site-1173528.mozfiles.com/files/1173528/6521007690.pdf
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5fb01c3e18e67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dewutexorob/jason_voorhees_mask_template.pdf
    • https://s3.amazonaws.com/wifukedot/vivah_full_movie_720p_mp4.pdf
    • https://s3.amazonaws.com/dadupawo/valgus_foot_deformity_treatment.pdf
    • https://s3.amazonaws.com/tamobalasu/jojonetabig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d312.bin
a6406e3b69cf7f7929ad157a5e018249815a7ee25cf4fb800148301234afda71
pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 5168 bytes
font_01_sfnt_off0000e4c4.bin
0c07b3e6ad31585f70d653d8539fc06450103830ba417a0179b11b120414b12a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 10324 bytes