Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1b83a6af640b4a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 18:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15fe00e21d804021ee9a62ea8aac4abd SHA-1: e1c078f99430d4db7709e3b3ef5ccd67156403d8 SHA-256: 5d1b83a6af640b4af281bc1be0260be5bac1dfc5d17a65235b6a0da3294656a2
210 Risk Score

Malware Insights

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

The PDF contains a lure related to insurance beneficiary forms and includes numerous links, many pointing to a redirector service. The ML classifier strongly indicates maliciousness. The primary malicious URL identified is a redirector that likely leads to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=brighthouse+life+insurance+beneficiary+form In PDF document text
    • http://files.lakehouselures.com/uploads/1/3/1/3/131382955/wukopet-zefujesemep-gepawumuk-xabotitoves.pdfIn PDF document text
    • http://files.historicnorthampton.org/uploads/1/3/1/1/131163904/womawilofupa.pdfIn PDF document text
    • http://zuzavub.shukokaikarateclub.com/uploads/1/3/0/7/130739214/c407d57a158583.pdfIn PDF document text
    • http://xixesapur.ditchwerks.com/uploads/1/3/2/6/132696414/e6ec4d38b98b.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/1/0440/1247/0422/files/declaration_of_conformity_template_nz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/boxenujisuloromapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/30250917401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/definicion_de_control_de_calidad_segun_autores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/97901264219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/install_os_x_10._11._4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/6106752450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/applied_multivariate_statistics_with_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/51784827580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/68153070808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/torch_browser_windows_7_free.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 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_off00005b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 5584 bytes
SHA-256: de10a0f1337de18ce2fab7832885a95046ff627188b3f5684d6fc263f203dab7
font_01_sfnt_off00006e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 14676 bytes
SHA-256: 493ae266f04bcd153e6175be8cd842876b5c1b390dffffc162c23cc351745358

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