Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74cc6d12f4407a0…

MALICIOUS

PDF

46.8 KB Created: 2020-07-29 13:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78cc53390db2e07d201da1756631e9ba SHA-1: 902659aac97772fe3d4afebdce8782bb55ca9a7b SHA-256: b74cc6d12f4407a0197df09e8e02fa808d574cf6955664a780e689af2c8067f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links points to a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document.

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=the+avery+shaw+experiment+pdf In PDF document text
    • http://files.crossfit-galveston.com/uploads/1/3/2/7/132740511/6025675.pdfIn PDF document text
    • http://files.anglianpc.com/uploads/1/3/1/4/131407135/jonuwifominubes.pdfIn PDF document text
    • http://files.mkbergh.com/uploads/1/3/2/3/132303013/wazifezimeg.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/1/0437/9249/8850/files/88124042507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/zibizojijitaburibumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7562/4355/files/70776427884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/46151760324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/dotixarejuxazavuliti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/3327694369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/77583550461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/manavojapejovotudiput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/nawugonizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/44414191760.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_off0000790f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 5196 bytes
SHA-256: aab658b99f50d167b545ff345b2a20bddd526f501cdea03f9f45344151172875
font_01_sfnt_off00008aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 10524 bytes
SHA-256: 04bfe84f5cf633994713d3bb9a106bbce01a5c82349582531ae60b9eee74ac23

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