Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9b55dcbbefcb77…

MALICIOUS

PDF

41.8 KB Created: 2020-10-08 06:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 31440ebdc8b0ba1a1e0a7e745d8282fc SHA-1: 7081a9265c6f15c19aec78a4f86a37e06b0ec4bd SHA-256: 7a9b55dcbbefcb770bed21a726e255f308dd4ffea7998e7bdefde076cb46e297
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://cctraff.ru/strik?keyword=tesla+electric+truck In PDF document text
    • https://site-1042842.mozfiles.com/files/1042842/11240024323.pdfIn PDF document text
    • https://site-1038831.mozfiles.com/files/1038831/ligeziketosojejikiza.pdfIn PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/luzol.pdfIn PDF document text
    • https://site-1041579.mozfiles.com/files/1041579/gebobijonopefeweravofofo.pdfIn PDF document text
    • http://files.jimcohenjudaica.com/uploads/1/3/0/8/130874031/bigozokopusozeveki.pdfIn PDF document text
    • http://sanobez.dblakephotography.co.uk/uploads/1/3/1/4/131407406/tedar_tutugulo.pdfIn PDF document text
    • http://files.superiorsalesdist.com/uploads/1/3/0/7/130739664/7579664.pdfIn PDF document text
    • http://files.flipsidetoo.com/uploads/1/3/0/7/130776499/dixumuti_rinoma_woxilufu_fetulugi.pdfIn PDF document text
    • http://files.shakirazchi.com/uploads/1/3/0/7/130775242/77921a.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/d11b0377-4955-4f6c-9c6b-d9905b9379fb/53835171646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/ellen_foley_nude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1307/8681/files/74029598289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9492/8277/files/71702681580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3085/7886/files/ragnarok_m_full_support_priest_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/stoichiometry_test_review_answer_key.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_off0000669f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 4808 bytes
SHA-256: 77293db75a59620f15502842add7716e903a28d87f46554b90b5d5ae05119c47
font_01_sfnt_off00007703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7703 10248 bytes
SHA-256: c549882d41510309e922656d11a95f0c264502435fd82a6109cb536f5e066869

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