Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc55f95473520e2…

MALICIOUS

PDF

31.2 KB Created: 2020-08-18 16:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16213f2e851f5d7a6c7053307ce995f9 SHA-1: 92bfdf96b7233e4dcc24481ed761ee81e54d998b SHA-256: 5dc55f95473520e21e342ff74a620512499f42d65db724d5b98f4af04565a7d3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains the malicious URL and references to other benign-looking PDF files, likely part of a link farm. The ML classifier strongly indicates maliciousness.

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=3.+standard+deviation+and+standard+error+worksheet In PDF document text
    • http://files.themissionhallproject.ca/uploads/1/3/2/3/132303312/noboga.pdfIn PDF document text
    • http://files.conscious-pictures.com/uploads/1/3/1/8/131871823/5215534.pdfIn PDF document text
    • http://files.fromplaygroundstopurpose.com/uploads/1/3/0/8/130874510/lexesilenon.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/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6166/7998/files/bosch_gsh_11e_spare_parts_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5368/4638/files/bwv_1042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/61104828778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/5403301075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/illegal_window_file_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/mesotudux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/42775318713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/16869460312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/bewegibuvapezisov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.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_off000040bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40BB 5196 bytes
SHA-256: f2e42df62bca4595b0a281116d290d1b4db3b1b95706031eefe4a79a40a67fa1
font_01_sfnt_off0000526d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526D 8680 bytes
SHA-256: aa0867a4f22644424baecab511290685facc36a20b8fd03bd5cced8cf91cf190

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