Malicious PDF — malware analysis report

Static analysis result for SHA-256 da073c90cf1a9967…

MALICIOUS

PDF

37.6 KB Created: 2020-08-17 14:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ad6203dfb7231188c8cabb3bafbe6cb SHA-1: ac0e204904daf70f6efbd977645c42e9f4c13a8e SHA-256: da073c90cf1a996708bcf51599f77cb7a308424906e3e50bc4eafb39a066eb51
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify, suggesting a link farm for SEO manipulation. One of the embedded links, https://ttraff.ru/pify?keyword=rs+feva+spinnaker+sheet+length, is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body is largely unreadable binary data.

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=rs+feva+spinnaker+sheet+length In PDF document text
    • http://files.boobsg.com/uploads/1/3/1/8/131857690/d95d5a.pdfIn PDF document text
    • http://goramo.winstonswisheducation.com/uploads/1/3/1/0/131070054/5104841b3.pdfIn PDF document text
    • http://nepisegoj.writingsfromjanmitchell.com/uploads/1/3/0/9/130969352/dovuzovajo.pdfIn PDF document text
    • http://files.skywatchdc.com/uploads/1/3/2/6/132682290/6424065.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/1/0432/8256/3232/files/bukhari_sharif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/ethical_hacking_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/49570246950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2037/8524/files/beauty_and_the_beast_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/93315969660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/vewuver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/saserivebimozamakesilex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/foputezemazenedadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/20835234022.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 2

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_off00004b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 5296 bytes
SHA-256: 4adb4291e360c8e94a272df8e2fbcaf3afdb9a90b28ff27bb07c0cae9defae61
font_01_sfnt_off00005d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D78 14528 bytes
SHA-256: fbb2dffa443076423dd2e8ececec4fad0d23de875c60eaecae2a323aa2f55c45

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