Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b68e5610339afe4…

MALICIOUS

PDF

43.2 KB Created: 2020-08-16 18:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7e65087dc3c36312eb9c8ea51ae3372 SHA-1: d091339056172ac89fe5e86933fd5a16bc09b68d SHA-256: 5b68e5610339afe40b52d57591dab9f8d35639b28b7c6a6c8eaf8ca4691c7ba3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Paracetamol overdose management guidelines uk' and the malicious redirector URL, suggesting a lure for users to click on potentially harmful links. The presence of a large number of external PDF links points towards SEO manipulation or a phishing campaign.

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=paracetamol+overdose+management+guidelines+uk In PDF document text
    • http://jemibu.kylepe.com/uploads/1/3/0/8/130813834/mosadatenane.pdfIn PDF document text
    • http://lekag.tanimaherphotographs.com/uploads/1/3/0/8/130813453/zelaf-nazenoje-refar.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/1/0440/7682/6789/files/rugabeginuvogekumaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/open_channel_hydraulics_akan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/futake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6797/files/lizaludok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/bibiliya_yera_mu_kinyarwanda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/98796106840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/79095515998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/17284943493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/wetixadozifakesakogej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8540/2013/files/argumentative_paragraph_about_smoking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/gurifet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/63404897890.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
🗂 Part of campaign: cpsplantscapes.com 4 samples

Related samples 1

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_off000061f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F3 5384 bytes
SHA-256: 9561a73f0bd45d2b6b8937d9e16553651004afacb2625be3d26f7013a619a328
font_01_sfnt_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 13636 bytes
SHA-256: 6baa1621bc23baf438df63818e9024ef1c1b4f901c60796a62ebb79089166c29

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