Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec38cd0b5177bcf…

MALICIOUS

PDF

115.0 KB Created: 2020-09-18 14:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a8471c446dff7acbbb33ab5160bb16a SHA-1: c48f26c6368107ee4b91345b3bb1ffdee773b2d8 SHA-256: 9ec38cd0b5177bcfb242370872287a1c7eea07e96de3c73ec87f11603319b516
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that appears to be part of a SEO link farm, likely designed to trick users into downloading malicious content. The presence of a 'download button' lure further supports this attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=prentice+hall+chemistry+chapter+4+assessment+answers In PDF document text
    • http://files.bocodainc.com/uploads/1/3/1/3/131382239/3ab44f9e56.pdfIn PDF document text
    • http://mitoxivub.rebeccaocainlaw.com/uploads/1/3/1/4/131437254/322792.pdfIn PDF document text
    • http://dafan.jharidingacademy.com/uploads/1/3/0/7/130776418/tobox_neloselimija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/17390369553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/wallpaper_android_white_and_pink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/82474349983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/cbse_answer_sheet_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/todixeguwopitigaxuwopu.pdfIn PDF document text
    • https://d06f3e49-9ceb-46f8-b757-7d5d7a78d7ac.filesusr.com/ugd/359e64_e73d9b370b944a98aa7494c2145f488b.pdf?index=trueIn PDF document text
    • https://4a5978d2-d2c1-42d7-9d00-d9f7d77df2cd.filesusr.com/ugd/bb3bf9_f4ad285bd87c46c18bd76aee56e3202c.pdf?index=trueIn PDF document text
    • https://840b44bb-8ee4-481c-a6a7-554147c16ef8.filesusr.com/ugd/268ab1_ab1f3f60d97a44f39b5b03676edf72a4.pdf?index=trueIn PDF document text
    • https://4ed576f5-3ac1-4f47-9e58-9dbb32441d09.filesusr.com/ugd/e32576_9e5f433452e44e638a4e352086588cf3.pdf?index=trueIn PDF document text
    • https://7a2fd1a9-a9b6-4093-8382-7433d048a89c.filesusr.com/ugd/957c7b_418e629eb5ac44d3bdcb61dcad22a897.pdf?index=trueIn PDF document text
    • https://b460eb70-af53-4a75-a824-d2c323a98b42.filesusr.com/ugd/bcc0e4_6b035b5b98cb4d7988174ab2a999f7b3.pdf?index=trueIn PDF document text
    • https://c6f9ce5d-a32c-4a75-a325-ba53e932ba0d.filesusr.com/ugd/930050_af55e2cc5b254c56b5388f506e858a7b.pdf?index=trueIn 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 30392 bytes
SHA-256: 74f554e86575a3e1389cbd24822b2c55bc653b8b2b45f0c905edd126c3e104ed
font_01_sfnt_off000151e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E3 5456 bytes
SHA-256: 91335751cb69515322252721eaf97147b2c3233e47d543962a717ea29320d201
font_02_sfnt_off0001645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1645B 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_03_sfnt_off0001743c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1743C 17140 bytes
SHA-256: 716a78bc1d0859d40e7fc3cf11f377ee7e38bdc8176f519056ef5aa37f559da5
font_04_sfnt_off0001a5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5F1 16248 bytes
SHA-256: 9e020c854edd9d16e76d4d276d806d6ad9537766fc0f49e31c6b0dee74960295

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