Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4ff7c889439139…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 23:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba653dd8301ba56cf0872334ee0e97f0 SHA-1: c643cb2fe09e752172f420846af38de284d57ffc SHA-256: 4c4ff7c889439139f80e9d500eede9ae10686034a85e6b61c6ba1ffb52c76ecf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to the linked URL, suggesting a lure. The presence of a PDF link farm heuristic further indicates malicious intent to redirect users to external sites.

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://ttraff.com/pify?keyword=gluconato+de+clorhexidina+al+0.+12+pdf In PDF document text
    • http://sapijope.1860sciviliancelebration.com/uploads/1/3/1/4/131453645/padigodetiloji.pdfIn PDF document text
    • http://files.vincetaylorslawoffice.com/uploads/1/3/2/7/132712003/df12b7ddc6f89.pdfIn PDF document text
    • http://files.phoenixtherise.com/uploads/1/3/2/6/132695493/0645c2.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/1/0429/1405/4300/files/kukifiwotituzitisotigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/17673655417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/68202570759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/curriculum_vitae_formato_para_llenar_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/leluzukaduwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/wibenugaragewop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/gosoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/dabubew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/80788338834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/29471362959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/metabolismo_aerbico_y_anaerbico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/5988187875.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 5520 bytes
SHA-256: 568069d233c6166db68511a6291661bfc5f72fc205d6c4a7934b575129671b09
font_01_sfnt_off000075cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 10376 bytes
SHA-256: 8fab62b86183153f235b5b1b923a76ff61d5d6fec7f8e950b74513344e700459

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