Malicious PDF — malware analysis report

Static analysis result for SHA-256 4007a13a3fcd4535…

MALICIOUS

PDF

36.3 KB Created: 2020-08-15 06:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b3ee2d6b440a8e1f8c521fee759ca8d8 SHA-1: 1bcad97dd0ba5cd9ea86616f569e247bd9635662 SHA-256: 4007a13a3fcd453590abed56a548b784f5f4c811f00ef1ffd0e061c11676161f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is known to host malicious content. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting an attempt to disguise the malicious link within a larger set of seemingly benign links. The ML classifier also strongly flagged this PDF as malicious.

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=compound+nouns+worksheet+grade+3 In PDF document text
    • http://files.jjenterpriseslcd.com/uploads/1/3/1/8/131871467/fuwikunu_sufekevena_nuzofun_vabekedidadow.pdfIn PDF document text
    • http://tanug.bearartstudios.com/uploads/1/3/0/7/130738956/7421657.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/1/0428/4101/4438/files/simadigojimeraxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/oxford_thesaurus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/47040646841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/case_files_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/varigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/66570083503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/31976246928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/canon_canoscan_lide_300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/63399143357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/able2extract_converter_online.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 6

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_off00004f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8B 5568 bytes
SHA-256: 8e7d579b1f93ba1e782878cd3e69c2cebd817b8cf1592732a7efa3975e037e56
font_01_sfnt_off00006260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 10000 bytes
SHA-256: 86f4f10de192311ecb743b9dd446590b9f3b9d263df7f7f8e8c00bc4e6e90738

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