Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f9de38b1d97f04…

MALICIOUS

PDF

56.0 KB Created: 2020-08-22 10:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff11188cf4578ead0ec15f9a8476fe29 SHA-1: 59baee35d5fd556b0b5f707cc67fea1d9e13e91b SHA-256: c4f9de38b1d97f04a7110f8448d7d94f704c3ca1631c30c899b8553ed4be09b9
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'separation agreement template' and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF. No scripts were extracted from this sample.

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=separation+agreement+template+uk+pdf In PDF document text
    • http://files.mywinningjewelry.com/uploads/1/3/1/3/131383754/6696617.pdfIn PDF document text
    • http://jekugo.pamelasosnowski.com/uploads/1/3/1/4/131437044/45d88.pdfIn PDF document text
    • http://files.tntcattledogs.com/uploads/1/3/1/6/131636772/8010715.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/1/0434/6036/2392/files/mexixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38655606666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1352/0029/files/65863512187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/27602834746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/45618700228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/89787187315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/nipafidozojem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/nodemcu_lua_esp8266_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/kakufulasabolugatozezolop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0972/6888/files/69560779277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5288/files/tcp_ping_linux.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 4

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_off00009d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D24 5348 bytes
SHA-256: 50a2c1bc30332bb85d3284869becd9fb7334bb1dd74b4adb31f913c4ec1ab329
font_01_sfnt_off0000af3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3D 10568 bytes
SHA-256: 4ba18e5a293726fc6486bc831701d1521171bba8dbf16fb0a068f289bfb48dec

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