Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78d55e55dbf02c7…

MALICIOUS

PDF

70.2 KB Created: 2020-09-02 19:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8865f92ad704f1985574cff5de05c8f SHA-1: bbec4983281520ecfa419f93bb2cfad14e19d78d SHA-256: b78d55e55dbf02c7cf508028af4d5d84d66ee8027db0ed6273df5465ba0d2ed4
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same text as the link's keyword, suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing the user to a malicious URL.

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.me/wix?keyword=emergency+endodontic+treatment+pdf In PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://static.usrfiles.com/ugd/7598fa_493312956a794d439d9071f108eb4eaf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc15ef_c10c9bbb8e884487b39a28d271da57eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b7c00_a3cfe8c3e8b145eda82c5ac40385b2d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3826db_8fda1ed7bc3741ddb8685315d64c20d8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_33ace708e8524835b9e9b6d815723726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/47972512764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2700/3549/files/pepsinogeno_funcion_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/kuvitedawetuzibidatobulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5270/3645/files/22412922831.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac72e0_8ff04ffe7419414688c14dca9532c6ac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_3fd824ee2ace4d1a92d836edea4c7a4e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB0 1684 bytes
SHA-256: a8640cb23b15ac802f89dd0648c07b7ad030d8b62c5f78624c3814794ace58c4
font_01_sfnt_off0000c614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC614 5324 bytes
SHA-256: ca697c283277f490d53758c8c20aca66ef16fb7e7ef6d5d9597772835d9173a2
font_02_sfnt_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 6092 bytes
SHA-256: b455134215c1f127543c9e9325f175308c359cbf98b278a12a4b01fea3a88c9a
font_03_sfnt_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 10268 bytes
SHA-256: 172426dd12c7970cea6e3e9b3d905837222b5947104df1802d953cd567ec5102

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