Malicious PDF — malware analysis report

Static analysis result for SHA-256 c332ca79584b57b5…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 21:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf1465f5df5f0c09719a7fb97f4387c9 SHA-1: 9034c20595d81dadff3acd03a58ec20c3e2a5dff SHA-256: c332ca79584b57b5f429b10cd62f2223a90f287a56cb111019bdff183c557576
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains the same redirector URL and links to what appear to be SEO-optimized PDF files, suggesting a link farm or phishing lure. The ML 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.ru/pify?keyword=blending+words+kindergarten+worksheets+pdf In PDF document text
    • http://files.hsemusicaltheater.com/uploads/1/3/0/7/130740536/1efb4d1bf1.pdfIn PDF document text
    • http://xizafadum.labambamexicafe.com/uploads/1/3/2/3/132303382/rowarotodo-vuxivujofekeku-kakolitinotas.pdfIn PDF document text
    • http://files.27andoak.com/uploads/1/3/1/8/131856844/6002040.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/1/0430/8893/7120/files/notetufukapumunuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/fekufupogubafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/69864500714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/47829222443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/95567936882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/76792634609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/41962396499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/kidamimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/m5r1_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/13035871378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/28755328109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/nipoxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/18977822730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/59408604229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/72772873013.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 7

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_off00006806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5508 bytes
SHA-256: 0ae44e313f507ce07e3f7426344f6c21d6ccca09f8aacdf0d5f3a3b998dde558
font_01_sfnt_off00007ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10216 bytes
SHA-256: ecffa28dd83ff08b5748670c55bc8bf404ed01d9bc8dee646113a415435baac2

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