Malicious PDF — malware analysis report

Static analysis result for SHA-256 998ec921a0c49e57…

MALICIOUS

PDF

42.6 KB Created: 2020-10-07 04:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0cd6eb2e090b47ebea5a10767e722169 SHA-1: 908e28ee2b6153c93a30a69685f01dfcb0576b29 SHA-256: 998ec921a0c49e57bcc5ec6ff11e2c79897f3631beda64c2061342a42f27f5c5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious domain, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text referencing 'free gems' and 'no human verification' for a game, indicating a lure for potentially unwanted or malicious content. The presence of numerous disposable host links further supports a malicious intent to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=disney+magic+kingdoms+free+gems+no+human+verification In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/32988928316.pdfIn PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/22567291014.pdfIn PDF document text
    • https://site-1040503.mozfiles.com/files/1040503/53290664803.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/86250712722.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/murolitazosa.pdfIn PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/kevuz.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/11417969552.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/29337717646.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/wunimuloxasog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f860e35a-29f1-47a9-bccf-8b5a23ee6996/14130133379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/vizio_32_inch_smart_tv_1080p_120hz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8391/8229/files/61391030795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5331/2928/files/knot_tying_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 5628 bytes
SHA-256: e85690ae93b93a16ad7e803d2b36454eb7c9da7e904231720cebc55ae27393b5
font_01_sfnt_off000078d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 10788 bytes
SHA-256: 83ac37a42467d9ab2a8b2aa0127cf9b57c9a1b316fb4abcc68a3600c7e10bb5d

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