Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f97728d6b2c04d…

MALICIOUS

PDF

35.5 KB Created: 2020-08-01 19:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6605bc84329d2147930650ac37586b3 SHA-1: 945ee4e207c7b3ff42467f2cf45debb8a8c69fea SHA-256: 76f97728d6b2c04d73f61bb0dd006823f7ccf00845e8eea71086bf82985a804b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself is heavily obfuscated but contains a URL that aligns with the malicious redirector. The presence of numerous links suggests an attempt to distribute malicious content or conduct phishing operations.

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/pify?keyword=total+line+thermostat In PDF document text
    • http://files.jillbealephotography.com/uploads/1/3/0/9/130969057/5519044.pdfIn PDF document text
    • http://files.templetattoo.co.uk/uploads/1/3/0/8/130874058/rumifaf.pdfIn PDF document text
    • http://files.trinitydentalcentre.ca/uploads/1/3/0/7/130775063/nurib.pdfIn PDF document text
    • http://files.charlestonctc.com/uploads/1/3/0/7/130740591/bokob.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/1/0434/5305/5128/files/22654939359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/binuvoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/tidifawolizizorimimikit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/tuxutoxubadikivivupesukiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/juzezusipur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/vazidotuwigawanefewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/kuviwolutofidideloba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/39256252209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5032/files/gopopimegunuzago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/37986846031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/winotuzoxoxet.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 7

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_off00004db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB9 4876 bytes
SHA-256: c3318aa6c08d343d299c7eabc3be436b7eee309618660ab70db83b19cb9c17dd
font_01_sfnt_off00005e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 10324 bytes
SHA-256: 61bde063c44cdf5d0fbddf5bef083e9323bfacf08d0bd8caae66b3c08905bef6

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