Malicious PDF — malware analysis report

Static analysis result for SHA-256 1390e4c35e0c822c…

MALICIOUS

PDF

36.1 KB Created: 2020-10-05 07:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c0ffd89e1abf9f269b20f56e8ca77928 SHA-1: 6a4f2cad2036a05c3c56d263c514f6b8364bfa7b SHA-256: 1390e4c35e0c822c18cf794a3478a830059a134f22476c30f64977f19165d003
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/pify?keyword=algebra+1+10.1+worksheet+adding+and+subtracting+polynomials+answers+1-25 In PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/85685617068.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/xibozukikasoxota.pdfIn PDF document text
    • https://site-1043296.mozfiles.com/files/1043296/xivalirolisovobukafakilu.pdfIn PDF document text
    • http://pijuxo.aqcreations.com/uploads/1/3/1/3/131380600/mugozewedas-vigesuxesi-borusa-foxederodurave.pdfIn PDF document text
    • https://site-1038343.mozfiles.com/files/1038343/45881610732.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/menafipibujazud.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/nejitakubik.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/1/0429/5675/1002/files/words_to_describe_a_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2189/7365/files/momasufuradidejiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/pifalekufatopozigaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/69102997927.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_off000042a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42A2 6388 bytes
SHA-256: 092a11121f5b8d81dce3be6c3314b52a791666d107946f2c8e2bdbd6bce0df31
font_01_sfnt_off0000585c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x585C 12768 bytes
SHA-256: 4e91d009b45bd40d59862bc7bad908ecbb8007863301309a77b27e6faf723f50