Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8dd5bc3bc4f704…

MALICIOUS

PDF

40.0 KB Created: 2020-08-26 15:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e811f12942be379643bbb3a918a1ec53 SHA-1: 457ad16db85fcbe7117c871c9d1dcd6b9392035f SHA-256: be8dd5bc3bc4f70446cc890bedc3f0c76d93fab38857a99ee5433e95a2446043
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Preschool worksheets age 3' and the malicious redirector URL, suggesting a lure to trick users into clicking the link. The presence of a link farm further indicates an attempt to distribute malicious content or SEO manipulation.

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.link/pify?keyword=preschool+worksheets+age+3 In PDF document text
    • http://files.telluridefacials.com/uploads/1/3/1/3/131380158/rizenexired.pdfIn PDF document text
    • http://files.woodlandstuition.com/uploads/1/3/0/7/130775528/030020d9497.pdfIn PDF document text
    • http://wamogum.innovativestoneart.com/uploads/1/3/1/3/131380213/5403554ed91.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/1/0435/7606/6207/files/lumujadulukogekazijaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/tawuxajubajexun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/tigokataxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/44832867320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9916/0475/files/14643514545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/antivirus_for_iphone_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/zutida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/50099603247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/composite_gun_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/51863514774.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_off00005dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEE 5384 bytes
SHA-256: 5b8e8218e0c6dced3a3c03259a9c91c3ade9470b7cd71f496e722728235e230e
font_01_sfnt_off00007045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7045 10324 bytes
SHA-256: 896bf1a534b5803c916f87ce9722512426e50129f858850f3159109a0da98e3a

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