Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4b9e2c57796f29…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 02:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cacd6553b89c627ee3a4a9b9e94f9f9b SHA-1: a72be088302509a2c3318926110f813caf54cc7c SHA-256: df4b9e2c57796f293032fc86f469283fcb0e13f8ad56b4d1e26d57700f5c92fc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link that points to a URL designed to lure users into downloading further content. The document body, though heavily obfuscated, contains text related to 'thyroid ultrasound radiology pdf' and the malicious URL itself, suggesting a phishing or scam attempt. The presence of a link farm further indicates malicious intent.

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=thyroid+ultrasound+radiology+pdf In PDF document text
    • http://files.thenehefoundation.org/uploads/1/3/1/8/131871814/2389252.pdfIn PDF document text
    • http://files.westerfieldadventures.com/uploads/1/3/1/8/131856772/xugamomorenax.pdfIn PDF document text
    • http://files.goldensandsresort.ca/uploads/1/3/2/8/132814958/ce3437.pdfIn PDF document text
    • http://files.fam-ilyproducts.com/uploads/1/3/1/0/131069978/414272.pdfIn PDF document text
    • http://rukoba.fxdecorating.ca/uploads/1/3/1/4/131453267/nidisovorolowi.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/1/0434/4306/0901/files/jaiib_accounting_and_finance_for_bankers_short_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/19215091567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/batman_arkham_knight_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/27478622987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/7792105310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/jekotijuguzijuputoditop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/bangalore_city_full_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/karim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/3034931325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/xokuzomak.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_off000074e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 5356 bytes
SHA-256: 8be5580f928aa07619a6cc69a6d7e8e05f79d630fb8cc5f26f3ff9cde6f2fabb
font_01_sfnt_off00008720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8720 10144 bytes
SHA-256: a38b456f1254f4da8e8bd00c9072a761b3718c363febed95f6c09d560ed6de7d

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