Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e28f50791d2771…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 23:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97f7040178118f3d57ef543c3ad24a53 SHA-1: f6267122475d424eaae4e20b3243410b12bac95c SHA-256: 55e28f50791d27710d4beccfb3d4eaff93363da7576ff09f31a2644e4c2d70c8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.cc/wix?keyword=bandeya+ho+ringtone. The ML classifier strongly supports the malicious classification.

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/wix?keyword=bandeya+ho+ringtone In 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/ee6770_fe29a16b2b5e400f89193c91301d3648.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/7313895225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/57360504820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/vuzogamakezerasopikoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/wowekez.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_3e0f27679680413eb31884c7baa317b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2b09b_9c2ca05ac00440cb8f279bd193a55745.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/902d29_9fb5cc53ac2c48e99504fa88d39af716.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 5

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_off00004653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4653 5028 bytes
SHA-256: 5220a36b0dbfac97bb6d0cdfaa59ff2d3aad6d00ece3a056f6350d892f8f1d0c
font_01_sfnt_off00005772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 9776 bytes
SHA-256: 28b9d293dcb6257829c609f009832691de0a8c4567e98cc6a8bb567f646c5ba5
font_02_sfnt_off00007938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 16752 bytes
SHA-256: 702db90d42636ecfbb1414188bfcce8466f506840e16ce24213d65cd16988d67

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