Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd93b0bfe29a8f77…

MALICIOUS

PDF

55.5 KB Created: 2020-08-02 08:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b3d331dcf383b120c0e1c992e24b16e8 SHA-1: 71e1504ae45b0c60b4e2f99625bacd86b0a1c71a SHA-256: cd93b0bfe29a8f774ab8a74a77aa137a3033938f8ee1c4e4b28909bafa2215d1
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 one specifically identified as a malicious redirector. The heuristic firings indicate this PDF is designed to host a link farm, likely for SEO manipulation or to distribute malicious content. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious sites.

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=discovering+the+lifespan+pdf In PDF document text
    • http://files.richkirch.com/uploads/1/3/0/7/130775840/rijuzera-raxezuvobafope.pdfIn PDF document text
    • http://files.ridgefieldgirlscouts.org/uploads/1/3/1/4/131407704/6054720.pdfIn PDF document text
    • http://files.dandressler.com/uploads/1/3/1/1/131164063/gikonelebumodijomot.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/1/0439/7491/8302/files/75620706192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/vabavojunivofibuxabedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/nububojozejokogujebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/donkey_kong_country_gba_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/8387021563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/56467948694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/acnl_item_ids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/21055011803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/vitegafuragizurir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/90319358066.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_off00009aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA3 5476 bytes
SHA-256: d7494b467a1f2cec5264c569386ef0e706e1721086ad7c8e934b8eba23f78c2b
font_01_sfnt_off0000ad4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4D 10484 bytes
SHA-256: 762f4f6690e605e0d54fc3b2a922a765217f7e897d87f919b429aca1a9dfd931

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