Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cb355eada52f86…

MALICIOUS

PDF

64.8 KB Created: 2020-10-28 10:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 18738192baadbfa0368786f9817515c9 SHA-1: c82c026ff127fa4872852db6ba507be809c18651 SHA-256: 54cb355eada52f86ff0393d58cce890cf57fbe610ab7287f33dc48c3013de883
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.me/123?keyword=luggage+weight+scale+bed+bath+and+beyond In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f90af86c2f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f907b31d53bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f9007236db8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f9112813b691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_5f98b435f0a07.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/043f03a.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/jipuzawa.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/nuwawizep_wazefafa_fakibabaralazej.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/957243.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/mexutizikuzol.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/wigotekidovusa.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/gomiriw_niredulobup_zulagatu_denazejokumuxor.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ba5b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ba5b.bin)
    • https://uploads.strikinglycdn.com/files/229a1a4d-d7ed-4789-996e-aebc10ef0250/55393808297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ad0b3b-7770-42eb-be0f-58fa31017a4e/18400490462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49030fa2-e806-451f-89e0-2457178ec0b7/fosoramudikupadaruji.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/different_types_of_computer_network.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/10452909567.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/50465037790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2acc4d-2cb2-4d55-a6cb-9795b13bede0/kagomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16152e45-3842-4836-a67d-9b3f74c141a5/causas_externas_e_internas_que_propiciaron_la_independencia_de_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cea27cb-a7e7-43d8-8b4c-b0c70445983c/23519034374.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_off0000ba5b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5B 5380 bytes
SHA-256: bb52de4fce7b84d205e532db6ee103ea08dd5c0236f4370d29975d950c08792e
font_01_sfnt_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 12508 bytes
SHA-256: 3ad747da95316915485dbe51978b276b18637bfb8c16b8db35755cb4388aba9b