Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c6e58c51882727…

MALICIOUS

PDF

49.9 KB Created: 2020-08-20 13:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c514f7de174812ddfa24878c53c56db8 SHA-1: 9bdae91b0ed1efc6e8d9b04fe9a88a337f78e87e SHA-256: d8c6e58c51882727962f92c12364ca5e64fdb5c13405f45a67b19d9d07e594b3
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to what appears to be a link farm designed to attract search engine traffic. One of the primary links, 'https://ttraff.com/pify?keyword=algorithms+illuminated+part+2+pdf+github', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a social engineering attempt to drive traffic 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.com/pify?keyword=algorithms+illuminated+part+2+pdf+github In PDF document text
    • http://zawakux.slktogo.com/uploads/1/3/1/4/131437850/59f0f1.pdfIn PDF document text
    • http://files.backtothepastresearch.co.uk/uploads/1/3/0/9/130969632/032e3bea2a762.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/1/0432/5936/3488/files/pdf_to_ms_word_editor_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/avant_propos_d_un_rapport_de_stage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/pofir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/rajomewuweteduzujudubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5131/1513/files/zbrojownia_starego_wiata_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/athlean_x_meal_plan_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/56677837688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/problem_based_learning_theory.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_off00008295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 5716 bytes
SHA-256: 248376b5c056e017d95e1ad2ab3ed1efca5dbbdf8bdb47e6450ef07c6ee77169
font_01_sfnt_off000095db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 11124 bytes
SHA-256: e1cd2239fa186193bc45a6502d28ceb8a3e8b4bcb0bb14afe0d4167e5bf50b9d

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