Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31516e9ed2f3752…

MALICIOUS

PDF

64.5 KB Created: 2020-08-23 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff34fe50a0a9f4981d37ee7a4b704da2 SHA-1: 1ce478f685034e6e9202958efc8418512b6cb336 SHA-256: b31516e9ed2f3752e9a91c92f6fe7d3121618c169e8143fa42dfd68974cf8fb8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic. One of the primary links directs to a known malicious redirector at 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains the text 'Tropical rainforest food web worksheet', indicating a lure to entice users to click the malicious links.

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=tropical+rainforest+food+web+worksheet In PDF document text
    • http://files.nomadperspective.com/uploads/1/3/2/6/132681632/523a9a51cce.pdfIn PDF document text
    • http://files.naturalenvironments.net/uploads/1/3/1/8/131856185/6328850.pdfIn PDF document text
    • http://files.weskimo.com/uploads/1/3/0/7/130739076/433066f0b9f7fc.pdfIn PDF document text
    • http://jegomut.calmlakefloats.com/uploads/1/3/2/6/132696323/gupelabewet.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/1/0437/8663/3377/files/tibowufekilelevolimamur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/agatha_christie_and_then_there_were_none_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/18245901317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/zaxugipokipiban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/chennai_express_movie_mp4_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/88675407078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/que_es_septoplastia.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 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_off0000a67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67F 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000b07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07A 5276 bytes
SHA-256: d3af5756a45c36971c51695c17d8f920a26dd2af92aa3e9625f354474e2182de
font_02_sfnt_off0000c260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC260 9904 bytes
SHA-256: be98d4380c81dcdfea3878ff1d61af3d20531108b26bab1c08f242bcb8b82da1
font_03_sfnt_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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