Malicious PDF — malware analysis report

Static analysis result for SHA-256 074725f4e2c3c0ea…

MALICIOUS

PDF

50.2 KB Created: 2020-08-22 02:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3cb220423212989f19c8a4e1febd9a91 SHA-1: 17c654eb894cc419d8e3fc2e52e77077b3ddeaff SHA-256: 074725f4e2c3c0ea9fa0432040d4deb8392191bb561ddf1ac99e0f4d48212a5d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a redirector infrastructure known for malicious activity. The document body and embedded links suggest a lure to download further content, likely malicious, under the guise of academic materials. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed for SEO manipulation to distribute malware.

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=worksheet+1.+3+vector+addition+answers In PDF document text
    • http://files.createlemonade.ca/uploads/1/3/1/4/131438477/latiluw-garizejen-befodanew.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/1/0434/5276/0224/files/18627232532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/assessment_strategies_and_practices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/61356316705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/tabikerumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/37530911026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/why_does_my_mouse_keep_disconnecting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6683/5352/files/vozomigawofagagewaxulipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/wopiximewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/adolescent_developmental_tasks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/th350_rebuild_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/57466121639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/towobapisunoposepan.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_off00007e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E99 5472 bytes
SHA-256: 968f36320ad7210c2bd6bc5a2e36a2fff267c5e4841d2d174d4732feac69de0d
font_01_sfnt_off00009158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9158 13540 bytes
SHA-256: 98888f0289bf73ce482d92e05431e4b78ec9a9e8a18b93706e2fdc9c8157356c

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