Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb15778845753c8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 19:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4154b977d02b57f1200a9bf5e72a446e SHA-1: 542103fb0aadf73578ba72c1ae4fa7a7ce48bde9 SHA-256: 2eb15778845753c88f7d12201e56b28ee2a892b31a5f54b45736be1b413701ed
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=the+algorithm+design+manual+pdfdrive', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDF links, suggesting a social engineering attempt to direct users to malicious content.

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=the+algorithm+design+manual+pdfdrive In PDF document text
    • http://files.nutritiousandnice.com/uploads/1/3/2/6/132695572/e9b15.pdfIn PDF document text
    • http://files.kittyvera.com/uploads/1/3/0/7/130776147/sisizawubasizemu.pdfIn PDF document text
    • http://files.italiancitizenshiptranslator.com/uploads/1/3/1/3/131381881/fapalinatemi-rokotukin-doluripat.pdfIn PDF document text
    • http://files.az-gems.com/uploads/1/3/1/3/131384636/b4a1dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/ecological_theory_bronfenbrenner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/git_bash_push_to_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/iti_admission_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/xadopisufasidojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/associao_de_geradores_exercicios_resolvidos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/woxumopekafipupubel.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 5348 bytes
SHA-256: d5d090ad3a9e595e09b6f2052ffe17ce99c24616b895a25e48642932e2a24b12
font_01_sfnt_off00006fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 10016 bytes
SHA-256: d5179a01c7c8f05ce1116786a6a0bff92a37f43dcd529cf5eb0a8af2ad945b18
font_02_sfnt_off0000922f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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