Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9571d28d487c13a…

MALICIOUS

PDF

37.2 KB Created: 2020-10-25 13:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b838d55dcb98fbc2b631acecd12b4b14 SHA-1: 898c38cdbdd38910b6443fae7cafbadad93e5484 SHA-256: d9571d28d487c13a3f957b89d6d681350a459fd1d84801b977a98fc426b10885
184 Risk Score

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.link/123?keyword=smart+watch+x6+manual In PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/364142.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/goloxo_nerasabajox_xikufemikurixa_wisirosej.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/9054575.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/sinirijebeleg_fisejasiruno_xisitisomos_rewabifasoburem.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/mofamavi_salakesu_sesiguno_rogut.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/defesug.pdfIn PDF document text
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/xoraj-worinukik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f904dabd9897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f9288ee35cd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000052aa.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000052aa.bin)
    • https://s3.amazonaws.com/memul/2463746375.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/linapubaseb.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/modal_verbs_obligation_prohibition_and_necessity_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/jurnal_penelitian_akuntansi_manajemen.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/banking_service_chronicle_may_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/blue_eyes_shining_dragon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/mojotusosefegijiludid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8189/2509/files/remoxefawatonawajumiruti.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 extracted file (font_00_sfnt_off000052aa.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AA 5276 bytes
SHA-256: b78454945b5bcf5d7f49a802721a5923c69cb225d9eb1ba76d7e6fea926b27c6
font_01_sfnt_off0000647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 10340 bytes
SHA-256: 73a661eced3f14468e6590f1d0ddfcabdbf43bb2a913e049c3294ecf68918341