Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5951313180c13c…

MALICIOUS

PDF

48.2 KB Created: 2020-08-16 22:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebf247286e9981eaf7c5117ae5ab4d27 SHA-1: dfd9d34d72034051464a99a9a0f22d9880f9a617 SHA-256: dc5951313180c13c6e4c0005c96d70d91da5c779f6a56cb4d28dcab3e6da4b01
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an examiner's report, aiming to lure users to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm SEO tactic to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=examiner%2527+s+report+acca+f3 In PDF document text
    • http://files.marylandbuilders.org/uploads/1/3/2/6/132681194/vadigux.pdfIn PDF document text
    • http://files.katieluka.pl/uploads/1/3/0/9/130969999/nasimem.pdfIn PDF document text
    • http://files.gloriamindock.com/uploads/1/3/0/7/130775245/b59065e87c5.pdfIn PDF document text
    • http://todewugok.nightingaletrio.com/uploads/1/3/1/4/131453206/moxiluzoteja.pdfIn PDF document text
    • http://files.nessflett.com/uploads/1/3/0/7/130740444/5017995.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/1/0436/1555/1645/files/bubegixuxuzizofolazizezaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/tilolomubaxifuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/jabitulubujanenumul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/16767157985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/41886863244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11286499769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/autoclicker_cookie_clicker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/flat_escort_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/futata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/dijemenezusibefu.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_off00006f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8B 5140 bytes
SHA-256: 05a37a34bb748fde9a2fc841d3bc1b366ed5481bd8fe40b7fda6df7be5a110ec
font_01_sfnt_off000080f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F0 10380 bytes
SHA-256: 1f63b943ce108daa749e07a83cbedbf7da78c7afefccb2fafb0d9a7c13231703
font_02_sfnt_off0000a403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA403 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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