Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db9a87ba1febb94…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 02:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57b5bf6013ab6c018cba1324a7e6373c SHA-1: c93eefa3873c1741f41955257c4da8025833a6d8 SHA-256: 9db9a87ba1febb94d08b81190e53ad87069c2ff3a2c77dafe52bc2ace516f152
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used to obscure malicious destinations. One of the primary links, 'https://ttraff.ru/pify?keyword=bams+2nd+year+syllabus+2020+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference a syllabus, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to drive users to harmful 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=bams+2nd+year+syllabus+2020+pdf In PDF document text
    • http://files.bobdyerspeaks.com/uploads/1/3/2/6/132695543/4575605.pdfIn PDF document text
    • http://files.qstreetband.com/uploads/1/3/2/6/132683000/futonogenigaxo.pdfIn PDF document text
    • http://files.lueveasdreamtoreality.com/uploads/1/3/2/6/132696029/4315368.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/1/0440/3278/6597/files/fileguzino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/werojogerepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/82895799241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/karitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/18912731306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/58751535469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/budomodidirirezubaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/71326194888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/39088389609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/37667514761.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 7

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_off00006f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 5396 bytes
SHA-256: 66b65718e4f01602d9dcc1d8fcd9531207e94c6660558c785e27ebb58eb14e5c
font_01_sfnt_off000081ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 9784 bytes
SHA-256: c4b7bc76f05a59fbb61bba30c497164852f1c000c81ea92ee11c2c3cd5e7c074

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