Malicious PDF — malware analysis report

Static analysis result for SHA-256 efcddd733daefc69…

MALICIOUS

PDF

63.0 KB Created: 2020-07-24 20:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3be61520c56b794fb97d40e337b9ce98 SHA-1: 06800d23d47252b36062526bbdbfe4823315d12d SHA-256: efcddd733daefc6983e0841a18e446599a48c5b9600b01ad0ad5aa85a7c5b00e
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 the heuristic PDF_SEO_LINK_FARM indicating a link farm of 28 external PDF links. One of these links, https://ttraff.ru/pify?keyword=nikon+capture+nx-+d+manual, is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading to 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=nikon+capture+nx-+d+manual In PDF document text
    • http://files.amystephenmusic.com/uploads/1/3/0/7/130775186/c2371f7e1e.pdfIn PDF document text
    • http://files.activefittraining.com/uploads/1/3/0/8/130814216/fe75e5f5a.pdfIn PDF document text
    • http://files.millennialtraveleats.com/uploads/1/3/2/3/132302919/3901844.pdfIn PDF document text
    • http://files.eudoniaacademy.org/uploads/1/3/1/8/131857421/zazuveke-palobajogaw.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/1/0433/1431/5422/files/nawanemizewubavazoziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/gamikepogibemalewoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/11796700253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/dejox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/fonujaseredamiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/womimitomukivosorur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/zenojib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/buwagufasimupik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/30140743894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/90063276871.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 8

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_off0000baa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 5056 bytes
SHA-256: 7553619a3b5dc71f7e0690e3fd773b8d4b55b22e2d2c16b743fd06bb063d764e
font_01_sfnt_off0000cbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBF 10380 bytes
SHA-256: c67456c93a03e6f3fe92e741c0694b6a44b735914290624062fb8dc7b23fdfed

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