Malicious PDF — malware analysis report

Static analysis result for SHA-256 636ca18060b35424…

MALICIOUS

PDF

35.0 KB Created: 2020-10-07 22:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5ec81356917097d403881fb36fd0506a SHA-1: 96bd9b3fa8885f380cf2e196a0a8cf58fcd073aa SHA-256: 636ca18060b35424359247e34a266f90a2331a76ae19c2c73e686891bfbdaeb3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic, which points to 'https://ttraff.me/pify?keyword=what+a+beautiful+name+spanish+chords'. This link is likely intended to lure the user to a malicious site. The document also functions as a link farm on disposable hosting, further indicating 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.me/pify?keyword=what+a+beautiful+name+spanish+chords In PDF document text
    • http://files.tinastewarddvm.com/uploads/1/3/1/3/131378780/zuzolokutelejes.pdfIn PDF document text
    • http://sotujenax.iapmdelhi.com/uploads/1/3/1/4/131437867/fc9ec90c7.pdfIn PDF document text
    • http://terapo.doctorgraniteandcabinets.com/uploads/1/3/0/7/130739227/mumebijevizaja_xomuba_juzonegavexote_jumot.pdfIn PDF document text
    • http://jarigadu.wallheathtennisclub.co.uk/uploads/1/3/1/3/131398069/e5ac871b6.pdfIn PDF document text
    • http://benufafi.ridgeandvalleyreptiles.com/uploads/1/3/2/6/132680835/d8e528.pdfIn PDF document text
    • http://files.wildernessfamilies.com/uploads/1/3/0/7/130738971/narubepifamefe-mepuwi-saduzitazavu-mipowosati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2433/5003/files/kayla_itsines_vegetarian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/35906342907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1542/4158/files/enlightenment_thinkers_excerpt_john_locke_apush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76f62dd-505e-40ec-bbf0-0e4d936db78e/nuwutuzafigigazametu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded676b6-fb25-45d0-bdbb-9ccb1dbfd597/pekupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f67afb-0329-4c28-a304-021fe56c59bf/lesomadusemij.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_off00004a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A99 5548 bytes
SHA-256: fa0bf715e6e8380f882a9910e87ba56a112c314558c4ffbb328587d72a4f261f
font_01_sfnt_off00005d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 9924 bytes
SHA-256: f527adaa9e907d9218af25cf9baa364eda1948cef1f505fba28d883b45b303eb

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