Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aadaba215a8ccb1…

MALICIOUS

PDF

32.1 KB Created: 2020-08-23 08:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8d90e7ce8a6321e0f50711ccadae9d4 SHA-1: c37c1d1966f1428ae8a9893c153aaa4286a8379b SHA-256: 0aadaba215a8ccb11d8d2680f506543180ed924a52e39a7de526d05f19d7c771
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector to malicious infrastructure. The document body and heuristics indicate a lure for free downloads, specifically mentioning 'case files neurology pdf free'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious redirector.

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.cc/pify?keyword=case+files+neurology+pdf+free In PDF document text
    • http://rudabi.socalendurance.net/uploads/1/3/2/7/132712348/c04f0839c6234f1.pdfIn PDF document text
    • http://files.curtsleague.com/uploads/1/3/1/4/131453177/mavofumefabefuses.pdfIn PDF document text
    • http://wetot.timgriffiths3d.com/uploads/1/3/0/8/130814328/7073242.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/1/0430/4519/1841/files/programming_in_c_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/border_song_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/human_computer_interaction_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/canon_t70_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/2611248176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/zawuzolijiwexiwomufuxezew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/check_python_version_jupyter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/jasuguzad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/xuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/android_os_version_percentage.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_off00004326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4326 5216 bytes
SHA-256: 81890fbf7fc6649ea9c8df87efed90ab0ad5b69639c4ab83f98289952fe65727
font_01_sfnt_off000054f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F4 9028 bytes
SHA-256: c1b4fae206ee6181115b2eaa3b0a4b944377ec41ca9a41f0ed11652ae03d6269

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