Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ece316c9fffbdd3…

MALICIOUS

PDF

40.7 KB Created: 2020-07-30 02:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8f49171caf33431d0d3d1e2b437960a SHA-1: 5c802af839a126dd492cfe22025912f18dcb79a9 SHA-256: 6ece316c9fffbdd39c6fe3f0aec001e121833c8ee41965ba2455f0ddfec0cafd
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate downloads, but many redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a link farm strategy to distribute malicious content. The ML classifier also strongly suggests maliciousness. While no scripts were extracted, the embedded URLs and link farm structure point to a phishing or malware distribution attempt.

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/pify?keyword=satyanarayana+biochemistry+textbook+pdf In PDF document text
    • http://files.eloquentlearning.com/uploads/1/3/0/7/130775848/cc6dec7b91ea.pdfIn PDF document text
    • http://files.dtsmidisystems.com/uploads/1/3/0/7/130776275/6e7c2.pdfIn PDF document text
    • http://files.tigertechrobotics.org/uploads/1/3/1/3/131398076/9543016.pdfIn PDF document text
    • http://files.llanfairps.com/uploads/1/3/1/1/131163890/3452510.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/1/0438/0285/3538/files/19135950080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/ladixukegugafitidasikijeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/18722386847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/3212296628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/fesid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/sakazesokawowonabofewov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/26277194694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/rekamovow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/90113056025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/54888361189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/61997976913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/74590607394.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 6

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_off0000616b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 5628 bytes
SHA-256: 696c6e27423d19dc9d7361d2bf90ab4f2bc7bc03588c9ed287352db5c6f96cc6
font_01_sfnt_off0000745c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745C 9712 bytes
SHA-256: 9187edf6a01e270dee92951b6dec775f1fcab68f93aa37826a1d2ad5fe3ec414

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