Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d1277fe94f2c6f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 09:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fb67e2829ad2912937005bf0878dfd1 SHA-1: 7932035c14672ad64a5121440aa995094cefd871 SHA-256: 15d1277fe94f2c6f0ab8fa79413ced2d95667fcfe8a5b23f9c7e5d5a3095f2c8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URL and the document body both point to a redirector URL, likely intended to lead the user to a malicious site under the guise of a free download. The ML classifier strongly supports the malicious verdict.

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=third+grade+eog+practice In PDF document text
    • http://files.pensvault.com/uploads/1/3/0/7/130738722/993e07.pdfIn PDF document text
    • http://gozef.aayogaandwellness.com/uploads/1/3/1/4/131454215/f86768f5ace2.pdfIn PDF document text
    • http://files.hartwoodnorthfarm.com/uploads/1/3/1/4/131453945/ropujovegowi-jejabate-jogasemumuzebed-tarunusunofaxad.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/1/0429/3260/0985/files/mathematical_analysis_t._o._m._apostol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/26500983588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/kibeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/rakisipujiras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/46802249152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/gewaderogeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6462/1216/files/wixanewavude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1426/2682/files/befimekoguse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/wodarulasasilevinujiwavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/sobuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/71389983527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/basic_accounting_mcqs_with_answers.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_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 5072 bytes
SHA-256: 3017be8f123fa7596b51aa67997f5e307da8572793968389a04a74ec8e7d0298
font_01_sfnt_off0000744e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 10108 bytes
SHA-256: 36e530a01fd9c3b8513f533a8e79cdde800b69bbe011d5a936229e5c17475c71

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