Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea5add3285ea16a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 23:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69cdb7b9b75fc14bea292cf29eb96718 SHA-1: 62501e3ce1a6d376188f3476a584db9e1b779c6d SHA-256: 4ea5add3285ea16abdbe31bf7fcc01567f4d68097c33fbeeaa1b32120ce1f523
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded text and heuristics suggest the lure is an 'online excel sheet login'. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of embedded URLs points towards a redirection to malicious infrastructure.

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.ru/pify?keyword=online+excel+sheet+login In PDF document text
    • http://files.treeservicewichitafallstx.com/uploads/1/3/2/7/132741555/zegigevujaguf.pdfIn PDF document text
    • http://files.cornerstone-civil.com/uploads/1/3/1/3/131378950/254407.pdfIn PDF document text
    • http://nemuk.houndshangout.ca/uploads/1/3/1/4/131453133/jobasukoxavux.pdfIn PDF document text
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.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/1/0433/3505/7559/files/71638046181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/3174967767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/6848819212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/xepodofijafafitivam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/free_rotational_symmetry_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/15585654070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/72604866113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/system_administrator_interview_questions_and_answers_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/google_photos_api_android_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/mitofedufowive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/adobe_failed_to_connect_to_dde_server.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_off00005996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 4852 bytes
SHA-256: c73d83a28220947148ec534d89bef5aab426a31db752421b8fe3aa33f9190c21
font_01_sfnt_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 12796 bytes
SHA-256: b285bb01aac234bdc746eed30ee72b93709a63ef042a785d58ae1c78b97cb761

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