Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc4892aa36f539f…

MALICIOUS

PDF

37.4 KB Created: 2020-08-17 11:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba3824d7be724580e09f39b4d0b2ae17 SHA-1: 9e26987a19b652f4e514b254188d359d71d54eef SHA-256: cdc4892aa36f539fd2e8b778e0d3d6015aa3e1b7d4fc3f372b04ba10980636ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link pointing to ttraff.ru, which is flagged as malicious. The document body, though heavily obfuscated, contains the text 'joyeux noel card template' and the malicious URL, suggesting a lure. The presence of numerous embedded links, many pointing to Shopify, indicates an attempt to obscure the malicious destination and potentially leverage benign domains for initial hosting. The ML classifier strongly supports the malicious verdict.

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=joyeux+noel+card+template In PDF document text
    • http://files.cofchristslc.org/uploads/1/3/1/4/131453370/burufozukupuxubulof.pdfIn PDF document text
    • http://lulugese.advisorthoughtleadersummit.com/uploads/1/3/1/6/131637030/802303.pdfIn PDF document text
    • http://nusesi.decoratorinwiltshire.co.uk/uploads/1/3/1/4/131453494/fitege.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/1/0428/9088/7335/files/bebab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/mikigemifidegebukigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/7032993454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/xebekesojafumab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/68484427389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/29767834446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/steam_boiler_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/jipizazup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/tamil_calendar_january_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/50252573809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/vewudugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/lapilenomat.pdfIn PDF document text
    • https://www.alamy.com/licenses-and-pricing/?v=1In PDF document text
    • https://www.alamy.com/stock-photo-merry-christmas-caIn 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 3

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_off00004df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF0 5200 bytes
SHA-256: 675ce23bb962c007e8c80de0e728b50e790be4ff77950b04b14e7ad64b1356df
font_01_sfnt_off00005f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F95 13204 bytes
SHA-256: 582f35471a890da131837d635c857de3c7632a9876206cba092b019090a959d8

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