Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b18dfc815db0a97…

MALICIOUS

PDF

36.2 KB Created: 2020-08-02 11:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51ca35e207bc40480685102bd274941d SHA-1: ba6c3f88a11fc834f83abccc2e19cf40fb3435f0 SHA-256: 6b18dfc815db0a975f41311b96f5bf9b9e98ca9cae866355e368766dacae1af7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URLs, particularly the one related to 'dell supportassist uninstall', are designed to trick users into clicking through to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=dell+supportassist+uninstall In PDF document text
    • http://files.meganrichmd.com/uploads/1/3/0/7/130775677/gufenoji.pdfIn PDF document text
    • http://files.modernknowledge.ca/uploads/1/3/1/3/131398224/xuruvudijuwijefiwul.pdfIn PDF document text
    • http://files.ryanglancaster.com/uploads/1/3/1/6/131636825/farevegefobib_tafiwisiwoloko.pdfIn PDF document text
    • http://files.tourmastersgroup.com/uploads/1/3/2/6/132681783/01b46a.pdfIn PDF document text
    • http://files.rivieraalta.com/uploads/1/3/1/6/131607062/5305ae88bbdcf1b.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/1/0437/4642/7034/files/kugixagosutazuwojuwej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/73288296061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/i_spy_an_alberto_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/nosajanisusivenuvelonibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/kebocode_com_gift.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/starters_lissa_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/84419498341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/beginning_writing_worksheets_for_kindergarten_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/towun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/segona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/4526808844.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47EF 4696 bytes
SHA-256: 70724891125a6548a990d7f5f042702a5a0ead75dabfd0891b9695f705ab78dd
font_01_sfnt_off000057ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EF 8820 bytes
SHA-256: 9226b1ab0aad658932807a95148ac1fac591773bfb6af71c5ca247ae234e6c6c
font_02_sfnt_off00007615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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