Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68dbd3b249d0536…

MALICIOUS

PDF

70.2 KB Created: 2020-10-04 20:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1fce417761df9fc412e46f3309973d7 SHA-1: 7715bf96a6af54987fda1c6c01866a6fd21c2e06 SHA-256: d68dbd3b249d0536a1a8661362de927ea03869bd8e8f9f57633585e039131611
94 Risk Score

Malware Insights

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

The ML classifier and heuristic firings indicate this PDF is malicious, specifically flagging it as a redirector link to known malicious infrastructure. The embedded URL, https://gettraff.ru/strik?keyword=estrategias+de+afrontamiento+del+estres+academico+pdf, is the primary indicator of this malicious intent. No scripts were extracted from this sample, but the presence of the malicious URL suggests the document is designed to redirect users to a harmful site.

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/strik?keyword=estrategias+de+afrontamiento+del+estres+academico+pdf
    • http://posagigi.kathrynamcmahon.com/uploads/1/3/0/7/130775195/6df18279b.pdf
    • http://files.clarkreeds.com/uploads/1/3/0/9/130969054/vatezajide.pdf
    • http://files.holyfamilyschoolcharleville.com/uploads/1/3/2/6/132681884/kemera.pdf
    • https://site-1036656.mozfiles.com/files/1036656/32942732791.pdf
    • https://site-1036965.mozfiles.com/files/1036965/wajunezisofunifesiber.pdf
    • https://site-1036779.mozfiles.com/files/1036779/wivorojabipabuximi.pdf
    • https://site-1037094.mozfiles.com/files/1037094/62077930825.pdf
    • https://site-1036744.mozfiles.com/files/1036744/lasabiposupexu.pdf
    • https://site-1039846.mozfiles.com/files/1039846/perotupod.pdf
    • https://site-1037141.mozfiles.com/files/1037141/94267044162.pdf
    • https://site-1037091.mozfiles.com/files/1037091/zudave.pdf
    • https://site-1039489.mozfiles.com/files/1039489/83576450997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/oracion_al_santisimo_por_los_hijos.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/jovodupodem.pdf
    • https://cdn.shopify.com/s/files/1/0472/2920/6693/files/lujofijipuxozudabini.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/sedagupepotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/80579731240.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_off0000c87a.bin
77ce9651f5c849bb00393889cb1a14cdcdf2a8e17cd2a28e3df7e27675da8630
pdf-font-stream PDF embedded font (sfnt) at offset 0xC87A 5432 bytes
font_01_sfnt_off0000dae8.bin
67e78b61dcbdd16cd161b048dc418187ff2a12d965e7c6c865d9cbd65204dc9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 15296 bytes