Malicious PDF — malware analysis report

Static analysis result for SHA-256 8737ab1b5de4e92d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 00:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ca5f933552eb2a2f08d5808010d7824 SHA-1: d4f29827a0dc758a86a20562e66ec6c9840c1f3d SHA-256: 8737ab1b5de4e92d4b9e99b30c1a886d886ab0331e075eecc891f44270c12c4e
194 Risk Score

Malware Insights

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

This PDF document contains a link farm of 15 external PDF files, many hosted on Shopify, and a primary redirector URL. The document body is obfuscated but contains the redirector URL, suggesting a lure to drive traffic to a network of linked documents. The ML classifier strongly indicates maliciousness, and the redirector link is flagged as malicious.

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.cc/pify?keyword=what+is+the+full+form+of+iqra In PDF document text
    • http://files.skylinebitandspur.com/uploads/1/3/1/4/131453464/gazofokososebixoze.pdfIn PDF document text
    • http://files.viking-bay-area.com/uploads/1/3/1/4/131437932/dobawola.pdfIn PDF document text
    • http://files.northwestanalogue.com/uploads/1/3/0/7/130775792/xotevapifu.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/1/0432/4855/0050/files/anexos_simples_nacional_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/41851759025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/40149924655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/community_law_manual_trees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0260/6246/files/satellite_photogrammetry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/zodikozawimobomugewukeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/alexandra_kohan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/65077866286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/74160754501.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 2

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_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5148 bytes
SHA-256: d376d423f37b2f41c062417b90f21d63dce2876b6ae32fd67d8dd1f9ebf65ad1
font_01_sfnt_off00007337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7337 10260 bytes
SHA-256: a0763899d145e43406fe89e0a1ee0ee3317bb8f63c8cce6d78a2ca6dee2b167b

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