Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26a8e7d60b6e4ef…

MALICIOUS

PDF

33.4 KB Created: 2020-08-24 19:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef908747f63f9bdb970afb173a3e176b SHA-1: 46069cb9b8501211753d137954b4f9c4bfd7d960 SHA-256: c26a8e7d60b6e4ef1000d1a049a23d7b3198d5ef8aab9a45718610efc319ffd8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a redirector service. This suggests an attempt to obscure the final malicious destination, likely a phishing page or malware download. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent.

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=don%2527+t+answer+me+lyrics+cilla+black In PDF document text
    • http://ludod.musicteachers.london/uploads/1/3/0/8/130813846/sewularosuvoz-girap-bewekemoseka.pdfIn PDF document text
    • http://juvuv.faloonaagency.com/uploads/1/3/2/8/132815758/xotegapube.pdfIn PDF document text
    • http://botolab.sgesurfreport.com/uploads/1/3/2/7/132712615/04da24960.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/1/0440/6591/5032/files/piwugazefotazobajuxinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7886/7358/files/nigorotabuvezufatotev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/89168921125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/yom_kippur_fact_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/88627241511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/zarowomojimefuzet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0967/9265/files/bawuzanejuwesimutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/harris_quantitative_chemical_analysis_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/19186854544.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 3

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_off00004576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4576 5376 bytes
SHA-256: 1481f9822e2c44f506f8e4ef714f91a0d9182543e45cfd145d1b7ca560d62a8f
font_01_sfnt_off000057c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C7 9740 bytes
SHA-256: 53cdbaa16235cab07ee3ca8e4c41ebe18fbafeacdc0f2c64132b31babef96e03

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