Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f19d83b2381959c…

MALICIOUS

PDF

37.6 KB Created: 2020-10-09 02:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8b75d63cfc4fb5e694d54be3621d81d4 SHA-1: 37b87fcc10888601002f044e34768fa2c450c9d8 SHA-256: 0f19d83b2381959c98e73d989d07eeb5097a186912a1a9a60eb3f6565f962bbc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to seating charts and the malicious URLs, suggesting a lure to trick users into clicking on malicious links. The presence of numerous disposable hosting links further supports the malicious intent.

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=united+center+seating+chart+suites In PDF document text
    • http://lebul.bestcarpetcleaningdavenport.com/uploads/1/3/2/3/132302846/jasanonozal_sozusi.pdfIn PDF document text
    • http://files.cliochris.com/uploads/1/3/0/7/130738712/sudomifefubex.pdfIn PDF document text
    • http://kupesos.laurapinney.com/uploads/1/3/1/4/131482933/xutunof.pdfIn PDF document text
    • http://falade.eibenteaching.com/uploads/1/3/2/6/132682974/dujakubatir-rawemeso-sawula.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/muxapokaliwa.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/79141884796.pdfIn PDF document text
    • https://site-1038660.mozfiles.com/files/1038660/tuvanopiluwogexawamawu.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/ae9bb37e-5e50-4871-8cdd-917f8d5a36bb/labizulutal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2786/4993/files/the_petition_of_right.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/81855405245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7603/4198/files/vowaruwurazovidomuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3540/1633/files/pifetexu.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_off00005333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5333 5160 bytes
SHA-256: 6f8962a9f1c0455da644cd27b2d9fb44b1b73a50978d714087b591f82c7062f4
font_01_sfnt_off000064bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 10844 bytes
SHA-256: de6e2de8755749e07e241888290ff28e8da1241f873b68c4b56e62a30ce7bd9a

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