Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f227d03e560c7d…

MALICIOUS

PDF

64.0 KB Created: 2020-10-13 21:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 2f7e235d33a696274a4a8b335c55537a SHA-1: ac448238c639cc59db4d768bf3a29dbce4cfcc67 SHA-256: a4f227d03e560c7d5575d8380c1524df57d88869cba0d752a2ea297f9a7506ea
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://ggtraff.ru/strik?keyword=desnutri%25C3%25A7%25C3%25A3o+infantil+marasmo+e+kwashiorkor+pdf In PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/telon.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/71959566599.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/linabugogepajelagatodi.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/29403322631.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a9de.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a9de.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000e236.bin)
    • https://uploads.strikinglycdn.com/files/58789d25-e9e6-4e00-af36-3af01f916ea9/93958256737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdb2236-06b9-47c1-8a9d-f8d3f6a0e70b/xafibitazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3815fb8c-bb4a-418e-86a0-a99e43214fc6/gaborudejemamezerodij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4c11d1-74aa-4d39-a6f1-f7672992b917/85888864594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e494b3-dec7-428b-b999-e7c54cee4311/70507560236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8115/7796/files/saboteur_ha_jin_sparknotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/nipple_cream_for_breastfeeding_cvs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4954/0507/files/spring_internships_2020_london.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3157/1879/files/kawetikutefinadonatun.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_off0000a9de.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DE 5820 bytes
SHA-256: 8f9fa4b9b75764b4ac1668d449cc99645ccf952c410c9853dc8b710dd32ba9d9
font_01_sfnt_off0000bcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFF 11276 bytes
SHA-256: 5d326777ac80f96d668fc5ef3bc1b884ccf8bda961a47d0231f5cec2f40630c5
font_02_sfnt_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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