Malicious PDF — malware analysis report

Static analysis result for SHA-256 9938298a2cecd981…

MALICIOUS

PDF

33.8 KB Created: 2020-08-17 14:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e81788a47219a757af778274f85a7edf SHA-1: fa5230d6a6459e69189d575fd25f2f9bebce8a86 SHA-256: 9938298a2cecd981232524b09ddb9356bcd087b5c93f19750f954cb57a4d4b57
194 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a study guide. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure. The document body contains the text 'Inherit the wind study guide questions' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a link farm, likely for SEO poisoning or to distribute the malicious payload.

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=inherit+the+wind+study+guide+questions In PDF document text
    • http://files.sachdevwc.com/uploads/1/3/1/8/131857152/radawugupesine.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/1/0435/8779/7151/files/puxuretufogiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/xopisipapan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/vernier_caliper_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/46501456384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/the_painter_of_modern_life_baudelaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/92823965401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/3d_face_mask_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/68374388432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/basic_algorithms_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3384/6183/files/xutagipituzovome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/13980549203.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 3

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_off00004867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4867 5104 bytes
SHA-256: 037c573917cfad149ef88068b5da14292114a7c812be0365881d8e3f29c2f08d
font_01_sfnt_off000059bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BB 9692 bytes
SHA-256: c36333a1e7e85fb5e7a14e1880b332578432f2929cf8ea7294d4c6867b693f53

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