Malicious PDF — malware analysis report

Static analysis result for SHA-256 29812c5e26d166be…

MALICIOUS

PDF

54.2 KB Created: 2020-08-11 14:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d91ec3cbb5454f40c84ff6d79481d2e8 SHA-1: 19cbc0eba39231098894f0577d9161647d8c1447 SHA-256: 29812c5e26d166bef25d30e427f4d8d1dc284cd790f6ee94b142897c6c14f1f4
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains numerous URLs, with at least one, 'https://ttraff.com/pify?keyword=aprendizaje+significativo+pdf+autores', identified as a malicious redirector. The presence of 14 external PDF links, many pointing to Shopify domains, suggests an attempt to distribute content or traffic through a link farm. 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.com/pify?keyword=aprendizaje+significativo+pdf+autores In PDF document text
    • http://files.elliepottsbarrett.com/uploads/1/3/2/6/132696512/jefiwibelexaw_vanajof_fatisokututug.pdfIn PDF document text
    • http://files.almostwild.org/uploads/1/3/1/8/131857758/davij-meregok-redugez-wewegeta.pdfIn PDF document text
    • http://files.theburnerdowner.com/uploads/1/3/0/8/130814042/zanirajuzidar.pdfIn PDF document text
    • http://files.nackip.com/uploads/1/3/2/7/132740378/lipilobid.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/1/0432/4609/2443/files/food_and_beverage_menu_knowledge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/best_epub_reader_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/14243869950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/15544981149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/jikapagafuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/advanced_english_grammar_book_for_class_11_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/77742311313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/37164125948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/54337121890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/sebolumev.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 2

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_off00009352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9352 5464 bytes
SHA-256: 083cbbcde8c9f5f84c365038958320a3b139953473133d8f1f6b63b1bf663b17
font_01_sfnt_off0000a608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA608 11264 bytes
SHA-256: 394936d4dba20a6428b52e5ef96d86f30e9a0d517c6a714ead75b23343b5982f

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