Malicious PDF — malware analysis report

Static analysis result for SHA-256 77783dd505b93357…

MALICIOUS

PDF

42.4 KB Created: 2020-10-04 04:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ccb53a7abd1b03c889b01e9efb6250d SHA-1: 33ab9da0399faedfe98cb99bcb99e61c3104b93e SHA-256: 77783dd505b93357461fb29370aab6cbe7e19e9537d217665c3f3425c231e849
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://gettraff.ru/strik?keyword=sierra+reloading+manual+300+win+mag In PDF document text
    • http://files.kksquiltstudio.com/uploads/1/3/0/7/130776567/tuzupesuxibigu-fomikowi.pdfIn PDF document text
    • http://zasogobe.drdavidshallenberger.com/uploads/1/3/1/0/131071164/peposop-rasekofeb-baretaxed.pdfIn PDF document text
    • http://warajeda.townofpackwaukee.org/uploads/1/3/0/7/130776401/mexuduzimu.pdfIn PDF document text
    • http://files.bijoucorfu.com/uploads/1/3/1/4/131406701/barime_zukobomuxa_vopamip.pdfIn PDF document text
    • http://files.lhp5thgrade.com/uploads/1/3/0/8/130874244/6533321.pdfIn PDF document text
    • http://geridined.hanneshapiro.com/uploads/1/3/1/0/131070420/dunezodo_medanopagud.pdfIn PDF document text
    • http://koxurap.sunshinervparkdadecity.com/uploads/1/3/1/4/131454120/854bac65163e.pdfIn PDF document text
    • http://files.thecourageousstepsproject.org/uploads/1/3/1/4/131453448/8498684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c1d824-dd7f-4d14-bef4-ba2f76005b20/97092650959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0646/6976/files/reported_speech_exclamatory_sentences_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/tovuderiluvasegizu.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_off000065bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BB 5468 bytes
SHA-256: 8c946350bb01b40283a2b4b5d1826eb419116cf8728e787008004f9d22ae1d6b
font_01_sfnt_off00007847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7847 10816 bytes
SHA-256: d6a08881d2095ef4563dc5839b1fdab0060e2295e3bb36a8ac6a7af1bf8c0903