Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee9d8bfb92106a5…

MALICIOUS

PDF

61.5 KB Created: 2020-10-10 23:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9493ecc59549b5606b1fddc813d3ead5 SHA-1: ed1c998cd3e04b0fb351e74740eedd81ed21062e SHA-256: 1ee9d8bfb92106a568ade98f404dceeaf3fe50a6af5dd8d43342f3df5b7b13c5
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to known malicious redirectors or disposable link farms. The document body, though heavily obfuscated, contains text related to 'diggy unblocked games 66' and URLs that are likely part of a SEO link farm strategy to lure unsuspecting users. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests an attempt to lead users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=diggy+unblocked+games+66 In PDF document text
    • https://site-1042502.mozfiles.com/files/1042502/7475765733.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/46771235452.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/9523777832.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/podeg.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/2461068949.pdfIn PDF document text
    • http://fomimuxif.rachelburn.com/uploads/1/3/2/6/132682883/9525183.pdfIn PDF document text
    • http://files.deb-johnson.com/uploads/1/3/2/6/132683334/wikafafu-pibeg.pdfIn PDF document text
    • http://files.themelbourneweddingsinger.com.au/uploads/1/3/0/7/130739991/varoxi.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
    • https://uploads.strikinglycdn.com/files/d99b0e24-6f69-4b03-b31d-95b89697e546/72367408283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5877a0a5-0bfb-44a0-818a-7df0e4cf1727/5190476436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eef9d36-3c7b-4e18-b285-ba93b3614ccd/dujaperi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4cd5be-848f-4856-871b-7463d04fce39/melikinuvuguzifatedosu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 5424 bytes
SHA-256: 112b3eaeb59269ba6e04bedb467da9be9b4423c0401831574a79d718be31aec6
font_01_sfnt_off0000aafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFE 15812 bytes
SHA-256: d988b066b46e9b4bfcda5fbb259243ad2c38aba08154b61589d16e681b1e1b7e
font_02_sfnt_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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