Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5caea922d5e092c…

MALICIOUS

PDF

57.7 KB Created: 2020-08-08 02:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69e8d8a2b74ff2da1ef1ea2723e26424 SHA-1: e27c34dc706fdfb0fcdc6ac22a934a1e721f0642 SHA-256: a5caea922d5e092c087a4b08666a941628a257050c007f17276fc53b49171ef4
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with 16 pointing to external PDFs on Shopify, suggesting a link farm or SEO abuse. One of these links, https://ttraff.com/pify?keyword=college+reading+and+writing+skills+pdf, is identified as a known malicious redirector. The document body is heavily obfuscated but contains references to the malicious URL and potentially search engine optimization keywords.

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=college+reading+and+writing+skills+pdf In PDF document text
    • http://files.hollykherndon.com/uploads/1/3/2/6/132683228/nidekobunezum_fawewobazoxi.pdfIn PDF document text
    • http://files.miguelchanonafotografo.com/uploads/1/3/0/7/130775373/rerel-wufakinaragu.pdfIn PDF document text
    • http://files.thesokofund.org/uploads/1/3/1/6/131636712/gojobefifalu.pdfIn PDF document text
    • http://files.takingittothestreetsbuffalo.com/uploads/1/3/1/6/131637635/9965781.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/1/0434/7356/7901/files/penguin_readers_level_3_notting_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/application_letter_for_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9807/9399/files/migopanowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/65206866622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/affiliate_marketing_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/xadijisojevakujigaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/search_engine_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/57783373293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/basic_bookkeeping_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/pesquisa_bibliogrfica_o_que.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/wofegugala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/ibps_exam_calendar_2020_20.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 6

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_off0000a512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA512 5268 bytes
SHA-256: 99a900fc83d1763b7f40fee94b866adde2d2b01dff08017fc414d5001010827a
font_01_sfnt_off0000b720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB720 9988 bytes
SHA-256: 0833795322276b2de83fc364faffd4bff4849cab2ec99df76f63257e4c68f215

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