Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39853b2d7e291ff…

MALICIOUS

PDF

77.9 KB Created: 2020-09-11 22:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e7bb6f7d0d36237b3d54cd35ece769e SHA-1: baa70479f8cbc2af6d88047af5fc677928427844 SHA-256: c39853b2d7e291ff582064f9b91dc4d86386dddbb130b49d4c3c9f1cb8a5d95b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a legal complaint and a URL that matches the redirector. The primary intent appears to be directing the user to malicious infrastructure via the embedded links, likely for phishing or malware delivery.

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.club/wix?keyword=answer+to+amended+complaint+california In PDF document text
    • http://files.callegarihorses.com/uploads/1/3/0/7/130775229/9726656d.pdfIn PDF document text
    • http://files.mrlondonsclass.com/uploads/1/3/1/4/131453432/sodilum.pdfIn PDF document text
    • http://files.stephanielamprea.com/uploads/1/3/0/7/130776728/bb48b1e665c8814.pdfIn PDF document text
    • http://fixij.granteyeglasses.com/uploads/1/3/0/8/130813592/2da315.pdfIn PDF document text
    • http://bijifa.mekwoodworks.com/uploads/1/3/1/3/131379591/de64374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/0511f5_b6a926c8858040f48bdfbd8a4e2f4b0c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/18206013604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/8506712078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/94519692916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/88425279739.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_19dd3e45d32d42ea8add3b1e20f40f48.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f46427_80da23a09a474dd2925d45bc9508300a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c4177_df971c4fff934c94b9aeaaee1c8b96bf.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 5384 bytes
SHA-256: ce64454d4aa63144a6d8f6d6e89764272c80955c443e870b078102c38f1a7f82
font_01_sfnt_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 10452 bytes
SHA-256: 91eee5832c52121bfda9936a953879b1096571f4b4d10195b14e048ab948dca7
font_02_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 16092 bytes
SHA-256: 47195e763854ab0168e5fb9c76c1646859b67d3c851c55b532704ccf99a4a610

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