Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8369d655f47aa9…

MALICIOUS

PDF

53.7 KB Created: 2020-07-30 02:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fdaf11a34c46b49db930eb43ab0ece3 SHA-1: 0294513ae6be178371113cd3d491c585c12292ff SHA-256: 6e8369d655f47aa9214e9002ac60422e5033e8b9feec6c845bfe8f6c4e87bce4
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, suggests a lure related to 'Cae exam samples pdf'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules confirm the presence of malicious redirector links and a link farm designed to distribute further 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=cae+exam+samples+pdf In PDF document text
    • http://files.seanysshop.com/uploads/1/3/0/7/130740142/ditida.pdfIn PDF document text
    • http://files.philomathopenstudios.com/uploads/1/3/0/9/130968942/7650205.pdfIn PDF document text
    • http://files.jagregina.com/uploads/1/3/1/8/131871535/lurusut.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/1/0428/0962/2695/files/rukagepidamiwitiwifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7863/2095/files/zuxopetekopejijifet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/vikanupabapavavetax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/74627543088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/32194255844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/medikugikuvesekojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/1716925506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/vifetubukamufaxasunox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/fivukurilino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/68007744267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/vituma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/86058705320.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 4

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_off00008c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1D 4628 bytes
SHA-256: b608a80607d6a29a48a1dd0e4a9da7a66d12bd4253a24500afe72270fa8d6c27
font_01_sfnt_off00009be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE8 14296 bytes
SHA-256: 570967ca9396cf015c8bcdeda114bda3ff68b005a8952168d3964d04d190b180

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