Malicious PDF — malware analysis report

Static analysis result for SHA-256 81173332ae2ee6a7…

MALICIOUS

PDF

47.2 KB Created: 2020-08-15 07:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18df5412c5a4c41cc8db58385361bbf6 SHA-1: acc167a5423756e03e024802d8506f93d7e77f04 SHA-256: 81173332ae2ee6a7e80420c2550a17e083d3284fbbaa70f79cbb8e683a789e85
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to create an SEO link farm, redirecting users through a malicious domain. The document body, though obfuscated, contains text suggesting a lure related to memorial donations, and the primary redirector URL is associated with malicious activity. 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.com/pify?keyword=memorial+donation+thank+you+letter+template In PDF document text
    • http://files.americanlandcorporation.com/uploads/1/3/0/7/130775361/8057430.pdfIn PDF document text
    • http://pedubon.livingwordhouma.com/uploads/1/3/1/4/131407588/wazazerojew-jatarudasepib-sitaruvumez.pdfIn PDF document text
    • http://files.stringsforhope.org/uploads/1/3/0/7/130739758/kebut_lotofutulebapar.pdfIn PDF document text
    • http://files.jdalestudio.com/uploads/1/3/1/8/131871740/7ed494cc83e6ca5.pdfIn PDF document text
    • http://files.sawdustsistersbirdhouses.com/uploads/1/3/2/7/132710780/fulagosaxevi-fogiwurirako.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/1/0431/6043/6887/files/lavukigumina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5253/7758/files/24540866549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/libertarian_paternalism_is_not_an_oxymoron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/67857946527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/bragg_s_equation_derivation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/firodogiled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/modusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/3909722265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/95732629343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/16005866272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/rubum.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_off00007974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 5192 bytes
SHA-256: a968352e98eba8c42383441f8ff35c9ac8cd91782991a34d19150e54c330f64f
font_01_sfnt_off00008af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF5 10592 bytes
SHA-256: 1630b146672137ba5e23826c87bf73e35d43d75a218a20d08cfaf366183f028c

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