Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fd6d9748230d9f…

MALICIOUS

PDF

53.0 KB Created: 2020-10-29 16:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 910f3094875083095ab08987529e8da1 SHA-1: b0058ae31ca6a3bcfa3668644047d871e49ca0df SHA-256: a4fd6d9748230d9f65c2fe9bfad9107c5dac78ffdac144d902658e617fcb20d0
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=yashica%20635%20manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f88b49cdc405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f96b66b00822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8b6fe5a971e.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/33b74c05876c7.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/munejofoviwu_tujuzosagego.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/9b4d907faf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8e9569aff37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f87fbb9cf6fd.pdfIn PDF document text
    • https://derewoju.weebly.com/uploads/1/3/4/3/134319287/2c21c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5f96fd21564a1.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/3007906.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000902d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000902d.bin)
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/patejarapumisuner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2936/4387/files/dibarika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0070/1343/files/1951_nrc_list.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_off0000902d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000902d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902D 5344 bytes
SHA-256: 9b256816019760a6c26a889f6ab3e87b4cc8e72390c131c33a01218f59b9787b
font_01_sfnt_off0000a23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA23D 11000 bytes
SHA-256: 66125edd8ee15c8bf6919d86c1dc3fd501d429eb0e755048c5377e19192253a0