Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6fad3895ca089d…

MALICIOUS

PDF

38.1 KB Created: 2020-09-10 19:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f3000e4d720e783231f0431a4be63c4 SHA-1: b1802c0947ff00055db238a28c187b160ca11a66 SHA-256: 3c6fad3895ca089dd245a4b4f08822a35d05e914f8aabcd5433b71954973ebe9
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm designed to attract traffic. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness.

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.club/wix?keyword=star+ppt+template+free In PDF document text
    • http://zuted.bathurst75fc.com.au/uploads/1/3/1/6/131637830/gaminamabineguzi.pdfIn PDF document text
    • http://kezora.parenting-examiner.com/uploads/1/3/1/4/131406744/kogemaguxowila.pdfIn PDF document text
    • http://files.maynstreetblog.com/uploads/1/3/1/3/131381614/kagimar_wawiziri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/8ebb60_8797c1c349cc44a6a355e6284a997226.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/33ab24_433827b8a6574424b01814b6bca5d61f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07e02c_0ce1da424fd841f081730e2dc697fc26.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1615c_ed95071155f447ef8ace1937d06ae688.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a11b0_240887fc1fb74e149ec3ccd52dc026be.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf804_2ed9532d34484bb68360026a82573e44.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc3ca9_5a685ab26f11454992ebd27fda6029ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9bd8c3_c1ff20b521054caabe5be7eed5bbbfdc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/percentage_calculator_application_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3974/4419/files/12957864060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8130/1158/files/os_sete_temperamentos_humanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/lujegigakanuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/urticaria_cronica_espontanea.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 6

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_off000057cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CB 4972 bytes
SHA-256: c7c8c14da008dfd496f7f2781d99e3d1bde3eb873ab2cd04e44365b6c5de889d
font_01_sfnt_off000068a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 10256 bytes
SHA-256: 5ef4d4746e91bfb52c775f67d62bc95f323f818c4f50ee089a1676d711fb9984

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