Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4e16a3691a1d7a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-03 05:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65d45216cb7527b6e0949a2bab4247e3 SHA-1: 30ce1fa43f107ab8581f4ffede472ade74f054c6 SHA-256: 5b4e16a3691a1d7ad29b764fea6b33b551807092331426f0c6a104d59248fab1
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though obfuscated, contains a URL that likely serves as the initial lure, leading to a link farm designed to redirect users to malicious infrastructure.

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=va+form+28-+1900 In PDF document text
    • http://files.nantymoelprimary.com/uploads/1/3/1/4/131454549/9718716.pdfIn PDF document text
    • http://files.kimprintzcustoms.com/uploads/1/3/0/7/130740483/cef74.pdfIn PDF document text
    • http://files.livesqueezy.com/uploads/1/3/0/8/130874339/6980051.pdfIn PDF document text
    • http://files.parkavenuetutors.com/uploads/1/3/1/6/131637656/lajol_zuwafafoduwo_zufudoveno.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/1/0430/9850/5369/files/nafagipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/sapas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5975/6702/files/55686764938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/ge_washer_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/85764222353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/nesifemokegul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/36943649834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/sony_str-_dn850_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/93813978262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/xojapigotarow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/12526488877.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 5

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_off00007281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7281 5376 bytes
SHA-256: 66b950f883e58d23afe233e159b22eed737449a02f7dc3de6d3372b7098579f0
font_01_sfnt_off000084c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C7 10396 bytes
SHA-256: d483a7cf1603047a56eb6584deec252b6e601aaf87faceeebe0d84ce87e937fb

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