Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8d75863012dff4…

MALICIOUS

PDF

47.3 KB Created: 2020-08-08 06:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86350527b8d0f837ed2c880b63966c1b SHA-1: f60cd9c44af98089490e9ffdce037cfca992eb18 SHA-256: 5b8d75863012dff47e063719b7fd8c98787db295411809ebc35a190c58f0f878
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, which ultimately points to a malicious URL. The document body, though obfuscated, contains text related to 'ischemic heart disease treatment pdf' and the malicious URL itself, suggesting a lure for users seeking medical information. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to a harmful site.

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=ischemic+heart+disease+treatment+pdf In PDF document text
    • http://files.simplycandyco.com/uploads/1/3/2/6/132696155/9508485.pdfIn PDF document text
    • http://files.kevinssmallworld.com/uploads/1/3/2/8/132814050/raxitapumifa.pdfIn PDF document text
    • http://files.grangertheatre.com/uploads/1/3/1/4/131407459/gadojudixugomajewos.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/1/0436/8993/5002/files/40148791817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/sajuxinaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/51362234570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/fodaninuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/rowute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/44521814003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/pibaliborufukagawen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/86610379158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/ayushman_bharat_yojana_hospital_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/vengeance_sample_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/vizikusiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/45738066273.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_off00007aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEC 5300 bytes
SHA-256: c272f1f9de68164c663454809a95783ca1bfb099848b8a4a42f811aa566bb174
font_01_sfnt_off00008cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 10412 bytes
SHA-256: d8ca3e6ab4b4a7d91ae0a9c31ccbfb2e4af718acba62c9f1acedeb1c7cb323b6

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