Malicious PDF — malware analysis report

Static analysis result for SHA-256 82df302fa2c94683…

MALICIOUS

PDF

42.4 KB Created: 2020-08-13 06:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e929280dab3f55fce99d6d93d6d0cee4 SHA-1: cfd206cee9f57f8e17abeca87937f91c42731f0d SHA-256: 82df302fa2c9468310039caf4794a3e713d29707c0c97b4dc5a30b9497e39b03
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector infrastructure designed for SEO-based link farming and phishing. The primary redirector URL is https://ttraff.cc/wb?keyword=ethics%20upsc%20pdf, which is also present in the document body. This indicates an attempt to trick users into downloading potentially malicious files by masquerading as legitimate content. No scripts were extracted, but the heuristic firings strongly suggest a malicious redirection scheme.

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/wb?keyword=ethics%20upsc%20pdf In PDF document text
    • http://files.gammaetaomegaaka.org/uploads/1/3/1/6/131636990/5608641.pdfIn PDF document text
    • http://files.andybutfoy.com/uploads/1/3/0/7/130738779/sajujusigim.pdfIn PDF document text
    • http://files.cswithwhitlock.com/uploads/1/3/1/4/131406234/zufanumur.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/1/0434/2644/7525/files/95726138619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/ielts_writing_task_2_free_download_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/95874362674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/anemias_classificao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/58901803940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/92415753603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/cch_chuyn_file_thnh_hnh_nh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/mind_body_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/25497906236.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_off00006958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 4864 bytes
SHA-256: bc10c49a4a58e6ab4b6ba7161cea05781122146f0d7b0dd05fe7679a565f707f
font_01_sfnt_off000079e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E8 10600 bytes
SHA-256: 0027d3edcbc6ee644ca241567fb8d947256ce2ef61206d0f7a3f3f22042e87d7

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