Malicious PDF — malware analysis report

Static analysis result for SHA-256 1268541e50420db7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 00:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53f5102d077a4a196f973ab5400b3f27 SHA-1: e9f26d636ef9b4af0eb4efed27ce6c4ccb9dbfa3 SHA-256: 1268541e50420db73c98afa2fa6799295735a5e183a7af9ca86e4fe15331a7e7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for hosting malicious content. The document body and heuristics indicate a lure for downloading a fake PDF reader, likely to trick users into installing malware. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=acrobat+pdf+reader+9.+0+free+download In PDF document text
    • http://files.cutthecord.us/uploads/1/3/2/8/132814241/moxawutofowawid_tumorifum_wegajifirezivij.pdfIn PDF document text
    • http://files.msbrodysclass.org/uploads/1/3/1/4/131406930/3935276.pdfIn PDF document text
    • http://files.nickjagger.org/uploads/1/3/1/4/131407029/2414756b.pdfIn PDF document text
    • http://files.mdrewery.co.uk/uploads/1/3/1/6/131606373/6737296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/98746171180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/91254510683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/mtga_codes_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/76458923175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/export_from_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/palos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/html_code_for_web_page_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/causas_del_fracaso_escolar_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/criminal_justice_system_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9561/1809/files/korean_grammar_in_use_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/99943784598.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 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_off00006d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 5260 bytes
SHA-256: 7d4a65deac8f1dac057631ca8c8a2387ca6a7df2ad190e9916ddfc1ccba4fb71
font_01_sfnt_off00007f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 10828 bytes
SHA-256: 69b2fac23e59a94124f5a976301d2792a6769c5fb9b466d412f43bd0492a6202
font_02_sfnt_off0000a3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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