Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2593817846f3c88…

MALICIOUS

PDF

58.0 KB Created: 2020-10-18 13:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: deea064178068c37e52b8e5b94c23e4d SHA-1: 4b59523c9944a98c36acc29989438101e8c54c28 SHA-256: e2593817846f3c887c102e96422b9753b248dd6a06df3fcecf91fae06a8c68c4
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting and a known malicious redirector. The primary malicious URL identified is https://ttraff.link/123?keyword=correlation+parametric+and+nonparametric+measures+pdf, which is likely used to distribute further malicious content. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=correlation+parametric+and+nonparametric+measures+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/zererozozutiwez.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/2df1da37.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/fozedojipezaja.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/b3485477cfe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8a86b74f956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f89329e4c77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87336a6aa27.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/a3ed947.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/c558058877e76a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87189d6bddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f8a3043db8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f876ff47e35e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f884cd68289a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f8aadf0312c6.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/01627793-68d7-4a7d-8b20-908f809d592d/2531742143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630908bf-1437-4cfb-bb4c-e2d97eb602e0/gagumefabenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e40957-d469-4843-a0cf-6e380b238e24/31641240679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92f299b-dfbb-4f59-a5f4-6a4760f045a6/secret_garden_an_inky_treasure_hunt_coloring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f887a786-2b15-4928-9813-31ff881109a0/kubazibuko.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76ED 5208 bytes
SHA-256: 0d3c12f40ac6dcee6bcb7f00a9d858076688c0381dd0120ed48c99af7c6c1844
font_01_sfnt_off00008879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8879 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00009107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9107 10580 bytes
SHA-256: 554880e28dd553c4fc7aecf95f54beacc827432c4bfb4e6ca324217b4fc24ac0
font_03_sfnt_off0000b554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB554 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
font_04_sfnt_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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