Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a5f08243c5e41b…

MALICIOUS

PDF

68.9 KB Created: 2020-12-16 23:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a4199c49cf58487ece5d7caa341a1ad SHA-1: 5890222eb6e5902b756ec77a58291ec82e7867cc SHA-256: 09a5f08243c5e41b4dd7fc8c20b10ecc401dc7b3afa27f02166000ca811a082c
154 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 'traffmen.ru'. This URL is likely used to lure victims to a phishing page or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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://traffmen.ru/strik?utm_term=occ+auburn+hills+financial+aid+office
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/donukadizolin/guide_to_starting_intermittent_fasting.pdf
    • https://uploads.strikinglycdn.com/files/32ff7011-b386-47e0-896d-ec841d9bd33e/arte_paleocristiano_y_bizantino.pdf
    • https://s3.amazonaws.com/vavebufevodutob/telugu_books_free_sites.pdf
    • https://s3.amazonaws.com/juvetaso/28127246592.pdf
    • https://uploads.strikinglycdn.com/files/29a89895-b4c1-4ad4-9fed-4fe205cea8a6/dewalt_dw660_cut_out_tool.pdf
    • https://s3.amazonaws.com/jipowumat/easy_calculation_med.pdf
    • https://uploads.strikinglycdn.com/files/8fd2ae42-a152-4d7f-b46c-754aeb39c824/waxafizamupol.pdf
    • https://uploads.strikinglycdn.com/files/ab8effa8-994a-42e0-b8be-56bbcd3ed4f2/wokine.pdf
    • https://s3.amazonaws.com/xovajukoxin/wbamc_clinic_phone_numbers.pdf
    • https://s3.amazonaws.com/zowejunef/avery_water_bottle_labels_22845_templates.pdf
    • https://s3.amazonaws.com/wilugugo/assembly_language_programming_book.pdf
    • https://uploads.strikinglycdn.com/files/f916ec7f-4202-4f6a-8581-20215b512a06/4413529097.pdf
    • https://s3.amazonaws.com/jazamerijekufol/remove_bookmark_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1b9.bin
a3c42544be150a3dcadf3915e8b0192b7c838738b089a8039183afb44f0e5c44
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B9 5076 bytes
font_01_sfnt_off0000d2e0.bin
9c714ca3a186fe6c9e02b49cfda0f20841b43d8b23b2e98061ab7c50e826aa93
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 12204 bytes
font_02_sfnt_off0000f8e3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 4324 bytes