Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25e8116d3901d19…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 05:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1b9c0b6a488b4e5852ff1f420362481 SHA-1: a451b26694f145f250648e9a243065f4162f0071 SHA-256: d25e8116d3901d19829e75bafdd2e5d2b25ffdcd09af41a3488d96d42865270f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to host or deliver further malicious 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.cc/pify?keyword=better+memory+now+pdf In PDF document text
    • http://files.eppicot.com/uploads/1/3/0/7/130775698/sesoxop.pdfIn PDF document text
    • http://ravup.highgradeglobal.com/uploads/1/3/0/8/130874493/nonixivep.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/1/0429/3502/5830/files/cetoconazol_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/62020052463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1898/4352/files/deepika_malayalam_calendar_2020_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/behavioural_science_in_medicine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/21855526772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/adobe_illustrator_cs6_free_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/present_perfect_already_and_yet_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7289/4629/files/5910660234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9249/8850/files/suwagobubigimixetabugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/37198733559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/apologetics_101.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_off00006a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3E 5008 bytes
SHA-256: 66e95501377c57a0684ac63bdfdc878c8c922e52a49f1544f168fa255e10ed05
font_01_sfnt_off00007b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B52 10136 bytes
SHA-256: 51e73eddd9f0e65ad79b5bca892a395e7508dba66fcab7121bf2c82dff4a9313

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