Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2af9dc52c8be93…

MALICIOUS

PDF

71.6 KB Created: 2020-12-01 03:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d978c14c73b7700bf24a038f8230400b SHA-1: ba9636ab673efb441bd45670532498b0da9c3d02 SHA-256: 8e2af9dc52c8be932802968ad1cd683e9dad5ab49feec07f601d93ff689ee046
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=fashion+stork+promo+codes+2020
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/libomexados.pdf
    • https://menebunokusup.weebly.com/uploads/1/3/4/5/134588819/3662400.pdf
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/4859457.pdf
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/kawunoka_pakesemumus_fepopenepegifa_dokaxesub.pdf
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/bde6a.pdf
    • https://zamelati.weebly.com/uploads/1/3/4/6/134652334/wapujibokenex.pdf
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/betanek.pdf
    • https://rinefoza.weebly.com/uploads/1/3/4/8/134883618/femamaku.pdf
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/8398056.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd005a8cb11b25c09c6d0f/1606221915072/s-290_student_workbook.pdf
    • https://static1.squarespace.com/static/5fc06b148139af037642cc0d/t/5fc1cc76173fb5383be534ae/1606536311850/86250783225.pdf
    • https://uploads.strikinglycdn.com/files/8b89041e-4d10-461e-ae7f-9cdc619ab16d/weduxelekipikaw.pdf
    • https://uploads.strikinglycdn.com/files/3d0f8d9a-6423-4ad1-8df2-fcd07946809e/larger_household_mod_sims_3.pdf
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc49affeaf37e3b642f037f/1606720255913/88793329496.pdf
    • https://uploads.strikinglycdn.com/files/4658fcf7-83d3-4d0e-be88-6696daba25ef/gipefomofibo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53f49b1ed03538d1da21/1606374388377/born_on_a_blue_day_goodreads.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_off0000d366.bin
c7f346a8b072275110e938b320becd6fa17be6faa5ca47c891cceb862a2706e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 5572 bytes
font_01_sfnt_off0000e632.bin
8ec5ab7a7ffcc33fb3a0064eddcddfd75260e3d5ff6fe02b7b4a41db98a0491f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE632 13116 bytes

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