Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ff080cf77e5d51…

MALICIOUS

PDF

36.9 KB Created: 2020-10-08 20:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5a976388b242d6722813a4ddadb8f8f5 SHA-1: 66f33d5391295f8342ef23cabd448cb9e0d3e323 SHA-256: c2ff080cf77e5d515e4cf71c17113ebe3ae8bd9016c325b081664be1e2cc4c03
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links to a redirector service, which is a common tactic for phishing and scam campaigns. The ML classifier strongly indicated maliciousness, and the link structure suggests a link farm designed to obscure the final destination. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure related to 'pampers cruisers'.

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.club/pify?keyword=pampers+cruisers+size+7 In PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/fulizozurob.pdfIn PDF document text
    • https://site-1040601.mozfiles.com/files/1040601/dazaxomabodaj.pdfIn PDF document text
    • https://site-1039666.mozfiles.com/files/1039666/39242236209.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/ziwerosuwowibine.pdfIn PDF document text
    • https://site-1038539.mozfiles.com/files/1038539/13353471190.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/84978934970.pdfIn PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/zaratezona.pdfIn PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/12458573449.pdfIn PDF document text
    • https://site-1039703.mozfiles.com/files/1039703/78915891424.pdfIn PDF document text
    • https://site-1040879.mozfiles.com/files/1040879/24999777790.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/vufapimutedidabem.pdfIn PDF document text
    • https://site-1038916.mozfiles.com/files/1038916/78231080517.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/51885137891.pdfIn PDF document text
    • https://site-1039381.mozfiles.com/files/1039381/66803392093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4768 4764 bytes
SHA-256: 542069e7684aa985cd720b4ea05a39a5152ed9ae5f6bfe05c86277343582d6a1
font_01_sfnt_off0000579b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579B 9644 bytes
SHA-256: 3c5b0127f61865c22b5fabb8952d75574a394de8b4e8247787db286b66f80fb9
font_02_sfnt_off0000788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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