Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58f16b15f8865fe…

MALICIOUS

PDF

52.1 KB Created: 2020-08-11 03:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bbbced1cd20cc2492675e1dc8d2f058 SHA-1: d01b8b5da4dc94f345e1b1acb0f8ae181faf3e8b SHA-256: b58f16b15f8865fed49cafa3c97414497a83106b977eb7f1d4cf8cda2a91359a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a link farm suggests an attempt to distribute malicious content or SEO poisoning.

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.com/wb?keyword=sami%20awad%20aldeeb%20abu-sahlieh%20pdf In PDF document text
    • http://rugit.smykkemageren.com/uploads/1/3/2/3/132302942/164d59e538.pdfIn PDF document text
    • http://files.melissafloresdesigns.com/uploads/1/3/2/6/132696351/guwiturebul.pdfIn PDF document text
    • http://megidan.oceansportnews.com/uploads/1/3/1/8/131872225/sawufijoj_namukiwonapive.pdfIn PDF document text
    • http://files.daviessurveys.com/uploads/1/3/1/6/131637553/e195255.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/1/0434/1324/2005/files/banach_algebra_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/fabururirogiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/virarerurilobixafebeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/42962500141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/zojiwezoxuvipero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/76220463053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/povefikemojeboretowoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/abstract_algebra_herstein_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/53923480611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/arduino_mega_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/rarinubejonupusivupuk.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_off00006fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 5552 bytes
SHA-256: d951f71ab7c2ff63fa11d6f29f9617740234a0f10a11e362887e4348326c931e
font_01_sfnt_off000082a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A5 10836 bytes
SHA-256: 3ea59e54414958dbd3fa98714a67260ce774faf7f6e81209aac01f38ff9cd3ce
font_02_sfnt_off0000a77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA77E 18056 bytes
SHA-256: bcb2d46384e3f0e396f0fe9503141c68027614d5baaed090945ea44c413044bf

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