Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd23e9f975cef7b…

MALICIOUS

PDF

51.1 KB Created: 2020-08-20 23:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02b1a00f7a781bfeaff5b7ea10aeb999 SHA-1: ca45f1df1e67ee4d3ddcccc640f226c9785f88b1 SHA-256: 5dd23e9f975cef7b186b6378328ea143cb19a4b3c00db28ac72aa39d4797afa8
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Mastering chemistry chapter 24 answers' which, upon clicking, redirects to a malicious URL. The document also contains a large number of links to other PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=mastering+chemistry+chapter+24+answers In PDF document text
    • http://files.daphnefatterphd.com/uploads/1/3/0/7/130775306/motalale.pdfIn PDF document text
    • http://files.tinaweldy.org/uploads/1/3/1/4/131408415/f0ac5d.pdfIn PDF document text
    • http://files.bensvintagevillage.com/uploads/1/3/1/8/131856158/gamonurimiserez.pdfIn PDF document text
    • http://files.cliocareer.nl/uploads/1/3/2/6/132696063/rupopit-dizopaf.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/1/0435/2314/5896/files/88300082476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/altivar_312_solar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0378/8960/files/zopaloxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/financial_accounting_course_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/35851139708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/tuzevekoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/mijudowukosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/application_for_schengen_visa_france.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/27203471969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/lugugolinegupuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/chemistry_atoms_focused_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7578/2054/files/wajedamajufuxawot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0565/6736/files/9937298409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/wujajabu.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_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 5736 bytes
SHA-256: 233603c094538eaff33f19591fb33ff0de6ba8ebf1f90a6ea5a8ad77726c9a32
font_01_sfnt_off00009b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5A 10500 bytes
SHA-256: fbaf2903a226028426b9436fbb65c5fe220e5c24a56c0adb551a6d4ddaa0ec32

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