Malicious PDF — malware analysis report

Static analysis result for SHA-256 a446d234e93ef3aa…

MALICIOUS

PDF

40.6 KB Created: 2020-10-05 18:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a71ebcdfcb7157e9ab893ea290aa0769 SHA-1: f850096862157cb1c929a3a6fe23c36d198a9b22 SHA-256: a446d234e93ef3aa46cf8f7cb6b9eeff4f9586fe096bbdb5f5fc384072744f83
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.club/pify?keyword=jacksonville+symphony+orchestra+illinois In PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/54837800574.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/natid.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/17973601143.pdfIn PDF document text
    • http://files.onecityhistoricalfoundation.com/uploads/1/3/2/7/132741433/2088774.pdfIn PDF document text
    • http://kuxofi.able-disabled.com/uploads/1/3/0/7/130775403/f01b6c6.pdfIn PDF document text
    • http://bugok.artprize.co.uk/uploads/1/3/0/7/130776225/vapagow.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/rowejake.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/mitefizusege.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/93501752337.pdfIn PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/90777669521.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/1/0483/3021/1481/files/tracy_ca_movie_times.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2923/5365/files/5_tibetan_rites_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4471/1847/files/sri_lanka_driving_licence_test_questions_and_answers_in_english.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_off00005f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 5388 bytes
SHA-256: acc38362aa9403de972d84e4105fb91ebd89351067b34781ccfa0caa68261858
font_01_sfnt_off0000719f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 10452 bytes
SHA-256: c1133127d452b8bb9d9dfd31db807aa7006b66a41369fafe5be5de482a512061