Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dee9f337ed081d7…

MALICIOUS

PDF

59.7 KB Created: 2020-08-23 10:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a982b495c8d4befeb08ab08ddb82008b SHA-1: 9c44c9610efcf76013c78fa4664d7524f41639b8 SHA-256: 2dee9f337ed081d7da41e754ca8f3361b3e8309c92de71cb0ec1701b0fba807d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm designed to host numerous external links. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document structure and link farm suggest a delivery mechanism for malicious content.

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=uterine+leiomyoma+management+guidelines In PDF document text
    • http://govalu.squarecatvinylshop.com/uploads/1/3/0/8/130813453/3835748.pdfIn PDF document text
    • http://files.johndecastro.com/uploads/1/3/2/6/132696598/kawewotunoredivuvitu.pdfIn PDF document text
    • http://files.ddtotalfitness.ca/uploads/1/3/0/7/130775331/vavaziralifutova.pdfIn PDF document text
    • http://zibab.k9blueprint.com/uploads/1/3/0/7/130775626/1184167.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/1/0439/1780/3675/files/dodeleniwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/muwufijumuvif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/42727258919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2633/1286/files/unchained_monk_pathfinder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/45886776684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/safiboninizurufuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/vawaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6413/4554/files/30259875801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/taxmann_ca_foundation_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/tutorial_amadeus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/free_colouring_worksheets_for_toddlers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/arithmetic_coding_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/de_2501_part_b.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAA 5120 bytes
SHA-256: eb31ec63232d59651f1d8f3a8e501bc95da78519f54cd0a9dbb80030c72c7366
font_01_sfnt_off0000adf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF7 11648 bytes
SHA-256: baa39316f602fe905c8a6ea7f4464f851a9453e334dff5681738584f35b9f55e
font_02_sfnt_off0000d381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD381 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333