Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9b9c035e0d8d0c…

MALICIOUS

PDF

45.6 KB Created: 2020-08-23 05:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17d3312fca8c71c4bd1ea16175c26275 SHA-1: 09a91f9bc1c53510afac79aac4782f2a6cb0f81c SHA-256: 8f9b9c035e0d8d0c7f6502a0b8e8c40131d012d75a4dd1898a16963964575743
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=education+board+result+2019+hsc+marksheet'. The document body also contains this URL, suggesting a lure to trick users into clicking malicious links. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent, likely for phishing or malware distribution.

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=education+board+result+2019+hsc+marksheet In PDF document text
    • http://vorux.legallysweettreats.com/uploads/1/3/0/8/130874474/rafejegap-gitodi.pdfIn PDF document text
    • http://files.btobconsultants.com/uploads/1/3/0/7/130775363/1981863.pdfIn PDF document text
    • http://legup.moorestudioarts.com/uploads/1/3/0/9/130969985/gotuxokudoweka.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/1/0431/8950/2110/files/advanced_excel_2020_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/tagumujanenitozivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/57592213344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0467/9576/files/performance_evaluation_report_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/alefato_hebreo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8470/0055/files/84780204661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/xinemikurobon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/midenojopod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8734/9148/files/car_driving_game_for_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/soil_bulk_density.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_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 5824 bytes
SHA-256: fdb94e8f90f0d1c0704fddf1a279e730b9fcb0b65c212039ecaa02b8202cb9e4
font_01_sfnt_off00007d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 13952 bytes
SHA-256: 4512af755ca17a59be1c61ff30cf38ca5133d09ec11a61e4d41e1e70c52f42ab

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