Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef8118b78469146…

MALICIOUS

PDF

72.7 KB Created: 2020-08-21 08:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11c7e50df2e3ecb0735a46638bdf9442 SHA-1: 7bbcb108820a28b67900820951a60d71eae48c77 SHA-256: eef8118b7846914665d0a54abbfc3d18d1710ec3edeeb59df8363591a5bdc3c0
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another identified a large link farm, suggesting a coordinated effort to distribute malicious content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

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=autothermal+reforming+process+flow+diagram In PDF document text
    • http://files.thewrightauthor.com/uploads/1/3/0/8/130814397/batukitotejan.pdfIn PDF document text
    • http://files.abellcable.com/uploads/1/3/0/7/130740391/vubupikepita.pdfIn PDF document text
    • http://files.massimilianogatti.com/uploads/1/3/1/3/131380871/ab3a4799439.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/1/0437/0874/3835/files/mamujerefudokibetejikad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/lowalajuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/93609532808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/raxeboguvimulafani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8031/0174/files/62737421140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/98216003670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/31215532330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1171/6766/files/25166625856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6033/1423/files/top_songs_in_the_world_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/pulajiviwazaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/ameritrade_ira_terms_of_withdrawal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5652 bytes
SHA-256: 469ed2f56d7505b78b89bba549af31842d60c8cab4394c732ebacc999420a190
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 11416 bytes
SHA-256: 05a985f6a2ae6312ff2ad9e35302e81276c42adbea2c1a7cca2cfb082781a84a

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