Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87dc8323eabf6eb…

MALICIOUS

PDF

40.8 KB Created: 2020-08-26 22:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78b948f7a7803925b12473cc624e6603 SHA-1: 7557dae40e803722fc2a663263c8819d518e70b4 SHA-256: d87dc8323eabf6eb8ffddc4fa14f4e37a3be3a92b5fd2dbb743b9e0c51c6bb55
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, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=plant+biotechnology+in+agriculture+pdf', is identified as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is largely unreadable, so the primary threat vector is the embedded malicious link.

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=plant+biotechnology+in+agriculture+pdf In PDF document text
    • http://nisipik.iccspa2020.com/uploads/1/3/2/6/132681268/241a60dda2193a.pdfIn PDF document text
    • http://files.zachpiercemusic.com/uploads/1/3/1/0/131070651/547ba.pdfIn PDF document text
    • http://mujovoga.deltabassclub.com/uploads/1/3/1/8/131857631/vafuw-wenafoxotagi-fudupusugunin-sidutejowukod.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/1/0429/5042/6780/files/feborovijamewanoxujiguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/5604811176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/27713236657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/health_benefits_of_meditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/virovadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/reading_speed_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/70880092297.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 1

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_off00005fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 5480 bytes
SHA-256: dc72c3809bee334b9094eb37da6557733c6cb80bba7979bcd4fa60b920c6cb35
font_01_sfnt_off0000725f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 10824 bytes
SHA-256: c5c1fb9ca01295d1d7a8264fa4c0a11a2de799f0cd26a7810e61d3a934b27098

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