Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4659ae32a2842d5…

MALICIOUS

PDF

34.4 KB Created: 2020-08-03 00:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8d08230f0ace86074a378abb484f34a SHA-1: 58bc46787d285884b5aa49d1cd6b021fd2d201d7 SHA-256: c4659ae32a2842d5a33268201a3da701d3941dcac1b5438bb2eff385abb3e54b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a malicious redirector link and a link farm, suggesting the primary purpose is to lure users to malicious sites. The ML classifier strongly supports the malicious nature of the document.

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.ru/pify?keyword=hampton+bay+exterior+wall+lantern In PDF document text
    • http://files.byrdhouseandladybugs.com/uploads/1/3/1/8/131872238/5714882.pdfIn PDF document text
    • http://files.balancedespitethechaos.com/uploads/1/3/0/8/130813906/filozidev.pdfIn PDF document text
    • http://files.ps111adolphsochs.org/uploads/1/3/2/6/132695405/ebd3501642f4af.pdfIn PDF document text
    • http://files.fosube.com/uploads/1/3/0/7/130740573/fudunaw.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/fulefevizurosojasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/25040832976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/mount_and_blade_warband_viking_conquest_companions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/tubunisezagupijola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/mad_city_gangster_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/6729407371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/kavexigufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/dalenikakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/tagunorolexitesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/sikemasewedelekesuvir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/28860335265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.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
🗂 Part of campaign: byrdhouseandladybugs.com 3 samples

Related samples 8

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_off00004952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4952 5148 bytes
SHA-256: 23347e581e5698c849ff003c2d4bc19fb4617ac57f019ff7f5e062c857d355f1
font_01_sfnt_off00005ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD1 9904 bytes
SHA-256: 74b07fd823633f0e6b6bbd0b1096e2eb5ccd0a77a83e293cd3664db7418a39a8

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