Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb9679cc30617a9…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 05:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd509563272ee305080138a32e44da28 SHA-1: 2da5838559bb8acf80101485ab59b06dd4130515 SHA-256: ddb9679cc30617a975aafb649354a3734562f549ff2808060c4251756c277bc1
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'Excelsior college information literacy final exam answers', suggesting a lure to trick users into clicking the malicious link. 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=excelsior+college+information+literacy+final+exam+answers In PDF document text
    • http://dexawewin.adriancarper.com/uploads/1/3/1/8/131856907/7124497.pdfIn PDF document text
    • http://lopano.aqua-ohm.com/uploads/1/3/0/8/130874330/zitukuwob.pdfIn PDF document text
    • http://files.eastsidechurchofchrist.us/uploads/1/3/2/7/132711966/kowivilapofos.pdfIn PDF document text
    • http://mipedepu.marilynandco.com.au/uploads/1/3/2/6/132681556/07f6acce9ba25.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/1/0437/5396/3678/files/chapter_1_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/83186026757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4567/files/42330833873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/kivotovuzew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/sekodasufajej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/gupajipaxejidebisaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/cambridge_first_certificate_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/meborenorinasazife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/palmistry_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/pdf_books_free_download_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/matopojusileruxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/78352808681.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 3

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_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5420 bytes
SHA-256: 590f4ce8445c3f90a4bec2e1b64aa0f2b3cf4e6d1065567368a5bd9b8fe15178
font_01_sfnt_off0000742a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742A 10580 bytes
SHA-256: ca9e9ad384de99ff4b28720881642886b24137995df4efac807dedaebb867e9a

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