Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25f5a5d35a19199…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 21:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98ed8c4555ff869d2282cf1d49a81660 SHA-1: 78acaa26b8ba40310f3d86eafcf5581d8a291d52 SHA-256: b25f5a5d35a1919988a1a4e723d3205fd663984daf334d84b5e94c5fe3ce08fd
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'Jacoco report template' that redirects to a malicious URL. The document also features a large number of external links, characteristic of a link farm, likely intended to manipulate search engine results or distribute malware. The ML classifier strongly indicated maliciousness, and the PDF structure itself was flagged for containing a malicious redirector.

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=jacoco+report+template In PDF document text
    • http://files.stnp2036.org/uploads/1/3/1/3/131383934/8591189.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/1/0431/4536/3610/files/niludapalazoxol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/jiwavabivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/xilidudeburuwiratezuzag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/different_addressing_modes_of_8051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/illicit_movie_2017_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/34003280604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/68698529916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/aushadh_darshan_acharya_balkrishna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/37636624228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/wogafugoxuxibifil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/fanebezosogiworifaraxofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/givigufulejawor.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 1

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_off00005c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9D 4892 bytes
SHA-256: 1943923b0d8886f97d8c7737b0be2da44d8ca7f2c89526b9ab20611ea8812715
font_01_sfnt_off00006d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D22 10888 bytes
SHA-256: f9bd9af9c386266921ad730d91cb43f753d1515860fafd731879f7b10a0da740

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