Malicious PDF — malware analysis report

Static analysis result for SHA-256 d388823161cb0d1c…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 06:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d299ca7634c6d66cca2759abb2cfcdb SHA-1: cfc6e6d3b9583059785933719d72ee1a84356125 SHA-256: d388823161cb0d1c7d13087ef5fbee1e44c1e5a47a6ce70b6d39a9ada75df03a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to this external resource. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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://ttraff.club/pify?keyword=mmx+official+value+list
    • https://site-1041688.mozfiles.com/files/1041688/soxenezuwugafoj.pdf
    • https://site-1043218.mozfiles.com/files/1043218/kowenep.pdf
    • https://site-1043199.mozfiles.com/files/1043199/lugol.pdf
    • https://site-1040125.mozfiles.com/files/1040125/27550553803.pdf
    • https://site-1037169.mozfiles.com/files/1037169/dagizozebedafiretujibalam.pdf
    • https://site-1037121.mozfiles.com/files/1037121/75603609762.pdf
    • https://site-1042442.mozfiles.com/files/1042442/fepaxipubuj.pdf
    • https://site-1038955.mozfiles.com/files/1038955/zevipemepusenulu.pdf
    • https://site-1043572.mozfiles.com/files/1043572/74142706728.pdf
    • https://site-1038909.mozfiles.com/files/1038909/misajofipewividosuzujulo.pdf
    • https://site-1039563.mozfiles.com/files/1039563/digopuzewo.pdf
    • https://site-1041946.mozfiles.com/files/1041946/78539550016.pdf
    • https://site-1036982.mozfiles.com/files/1036982/22614819912.pdf
    • https://uploads.strikinglycdn.com/files/6274cb65-a5c2-4ac2-a06c-405669611f28/26694635844.pdf
    • https://uploads.strikinglycdn.com/files/d7666c84-4b8f-456f-bb11-c47b30bf0b16/sonitodivalamodovid.pdf
    • https://uploads.strikinglycdn.com/files/258665d7-092a-4a86-acc7-a5ebf0e7fc13/golilifofetizek.pdf
    • https://uploads.strikinglycdn.com/files/14587636-1d04-4989-8718-6f3c455d2c43/7223747063.pdf
    • https://uploads.strikinglycdn.com/files/bca3fdc4-e10b-4392-a1f6-27aa27b99e2f/99522403031.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006002.bin
4a545e3ba2b0fa181bc3c90c302f12457b6fb87d4a367185a9b57f66afe63e38
pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5064 bytes
font_01_sfnt_off00007147.bin
b23c3b753e956d126fe4ccabfcc68062e5d29be988ecb634bf42296e43e01ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 10412 bytes