Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9a68c4bef3b9f4…

MALICIOUS

PDF

91.2 KB Created: 2020-12-21 01:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d0a72e6be1deb6e8a5c67039b1f571 SHA-1: 7a3a3ed60e764a6ff98df7961297a4075867fa85 SHA-256: 9d9a68c4bef3b9f4a5cfb1986292bc1108001fb373e03e273e7da7e6447d189b
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 'https://traffmen.ru/123?utm_term=adidas+duramo+slides+blue'. This indicates the document's primary purpose is to redirect the user to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=adidas+duramo+slides+blue
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5f9dfc1940e63.pdf
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5fc694aeec43b.pdf
    • https://static.s123-cdn-static.com/uploads/4489717/normal_5fc3f1ba9e735.pdf
    • https://cdn-cms.f-static.net/uploads/4469353/normal_5fb8d6f0ece10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/67641234-a9e7-425c-9d08-92bec8a300ee/crime_and_punishment_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/733fb8e5-745a-4660-b768-71000b602393/call_of_mini_zombies_2_apk_mod_download.pdf
    • https://s3.amazonaws.com/xazarujokemus/46150245544.pdf
    • https://uploads.strikinglycdn.com/files/ff4be62e-ae6a-488a-82a2-1f2bcfe82d53/welcome_to_the_game_ii.pdf
    • https://static1.squarespace.com/static/5fde89c80172f85bb329d465/t/5fded888c18bd5077caaeb73/1608439945030/bifiladeki.pdf
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fce2e7f662d5e24e0cc6fb2/1607347840027/father_sons_clothing_uk.pdf
    • https://static1.squarespace.com/static/5fdf246b2dcd53187f20af33/t/5fdfcdafa478394ebcc27c8b/1608502704754/bluetooth_for_pc_install.pdf
    • https://static1.squarespace.com/static/5fc292a4e5c7695ca9a65d9d/t/5fcaf0f21ef6d1662fe53be0/1607135475516/56878167356.pdf
    • https://static1.squarespace.com/static/5fdcb77cc464b41678cc2762/t/5fdcdb3c550b0003eb031a86/1608309564837/song_african_queen_remix.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ef.bin
52917d4c6b148ce26292c3959141e4fef438aaa2f8c40724e8c4dcf4c56fba8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 5100 bytes
font_01_sfnt_off0000f91e.bin
98bc553b844b320c9e5bd91035a5d7596141e06386f95b669240af8574efdad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 11360 bytes
font_02_sfnt_off00011968.bin
93bd2809b80ab3972881fd20662e92342d757dc8d0d95a80a9263ba2ea539f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 10448 bytes
font_03_sfnt_off00013d58.bin
37f00004ed5ed2a21f90b66b23ed3f3ea4e7bb635759a2e432958b33d4f10432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D58 10388 bytes

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