Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9491151fa3be922…

MALICIOUS

PDF

47.6 KB Created: 2020-08-19 19:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 754aeaebd4e46d5119517f1c8e31e542 SHA-1: 0667b104c4c4738c768819ff4981bdeaa46565e3 SHA-256: b9491151fa3be92298f4b46b3728a2f455f551b5b2ea6eb3db455a44e4bd7ac4
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate worksheets, but the primary link redirects to a known malicious domain. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's purpose is to lure users to malicious infrastructure. The embedded URLs are part of this redirection scheme.

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=evaluating+logarithms+worksheet+with+answers+pdf In PDF document text
    • http://files.ellendonaldson.com/uploads/1/3/1/8/131856146/tetoj.pdfIn PDF document text
    • http://filexiwin.sdsuzukiinstitute.com/uploads/1/3/1/3/131383483/d61d9cb999.pdfIn PDF document text
    • http://files.heartlightcharlotte.org/uploads/1/3/0/7/130776167/9332443.pdfIn PDF document text
    • http://files.keeperswesternstore.com/uploads/1/3/1/4/131438059/redezofoluredaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/topisetoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/60597662643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/restaurant_inventory_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/pipette_calibration_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0990/files/gafawijilakofajoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/bibubegivelidimejijax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/kijoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/kabokamanaromogufowite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/xugimaditonozofixesusan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/35527027630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6340/1877/files/salesforce_developer_tutorial.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 5512 bytes
SHA-256: e2f0a271edf8a23680d4dc61c855559fe8c566d2acc0e22c7c3177e68efc155f
font_01_sfnt_off00007e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9A 10664 bytes
SHA-256: e324aebe62f72e3b460c55a918b4de47955a5b1b3189f92fe91a4e621ac4e05c
font_02_sfnt_off0000a312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA312 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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