Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fd8da3dce08efe…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 12:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbe79f1a3ca9e971626c56667c412f40 SHA-1: fb7654754cc926580e993f6c21585997814bc62e SHA-256: e8fd8da3dce08efeb36b434d689605c9c28019fe593ec48df6bc5298702fe7b6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF file contains a link farm with numerous external links, including one pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text and embedded URLs, suggesting it is designed to lure users to malicious sites rather than provide legitimate content. The primary attack pattern involves redirecting users to potentially harmful infrastructure.

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=proletariat+vs+bourgeoisie+pdf In PDF document text
    • http://files.mothersforothers.org/uploads/1/3/0/7/130739450/5c15bbe.pdfIn PDF document text
    • http://files.wimfoxvalley.org/uploads/1/3/0/7/130776042/f335f392b0.pdfIn PDF document text
    • http://files.jelanaduncangolf.com/uploads/1/3/2/8/132815960/nelozabi.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/1/0428/2492/5347/files/39258271266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/natilimapokuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/77917388966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/jovamufuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/89210964364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/bali_tourism_map_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/kebulet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/inorganic_chemistry_books_for_bsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/rufumerexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/libro_de_microbiologia_medica_lange.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/32574386858.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 5

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_off000062f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 5412 bytes
SHA-256: 8a0959ecc1b302b21bd49965c436a5ba1256c9436e8c3cdb384fdd737fa69810
font_01_sfnt_off0000756a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 9960 bytes
SHA-256: dcccdfc7774d13c856c983e5fe0e0d3b33ad65c9f2b32687b2d2b8df9de47581

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