Malicious PDF — malware analysis report

Static analysis result for SHA-256 c610e27e2c811837…

MALICIOUS

PDF

73.0 KB Created: 2020-08-08 21:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8376b106a647d18b988510516aa77475 SHA-1: 5659d362306f8c9571704438a3bbcc71116cf371 SHA-256: c610e27e2c811837606a01fed764c83b802cffe9fa64ee7c18cf0bedf61bb193
234 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Cdc pneumonia vaccine guidelines pdf'. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the malicious redirector. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be intended to trick the user into downloading and opening a password-protected archive, which is a common tactic for evading initial gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=cdc+pneumonia+vaccine+guidelines+pdf In PDF document text
    • http://ripefaxa.wildrelys.com/uploads/1/3/1/6/131606407/5852591.pdfIn PDF document text
    • http://files.lorettacrogersnovels.com/uploads/1/3/0/8/130813516/452710.pdfIn PDF document text
    • http://files.bleststudio.com/uploads/1/3/1/6/131636825/vekepulipad-kenetuxab-woluluwoguzid.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/1/0433/5206/4155/files/80844184877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/buligotamuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/49703457281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/23374492732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4453/files/41559786803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/56065064055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/variable_independiente_y_dependiente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/duwededotizomexivudofuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/sigejasezebedip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/bacteriophages_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/54420300502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/canterbury_tales_pardoner.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B3 5344 bytes
SHA-256: 129a38097bd5bac9ea60f4d45b69102b9aec14b067eaf61427a34a6b384cfd0e
font_01_sfnt_off0000c9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CF 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000d25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 14820 bytes
SHA-256: 1491ba1a5491455d1e87e1e934b1ca44431eea118c28bbfad50374dbcfbbc0df
font_03_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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