Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54dd20c8d9a7ebe…

MALICIOUS

PDF

34.0 KB Created: 2020-08-03 00:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f749c34d1354eef1fd02b2abb4dd9bac SHA-1: 004aefa837c39f08eec2e23ecd33642e0a6c03d6 SHA-256: a54dd20c8d9a7ebee8854007cc6870fef752e4607aba750aee7f7bca9f35d52e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The document body is heavily obfuscated and contains a mix of seemingly random characters and URLs, further supporting the malicious intent.

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=captain+sanders+treasure+map+vanilla In PDF document text
    • http://files.mindswan.com/uploads/1/3/2/6/132695372/a85f31e3fef.pdfIn PDF document text
    • http://files.rcdesignceramics.com/uploads/1/3/1/8/131856290/2599222.pdfIn PDF document text
    • http://files.neora.ca/uploads/1/3/2/6/132681758/fepuzijonepida-gumulod-fivuzinik.pdfIn PDF document text
    • http://vafet.paolositaliankitchen.com/uploads/1/3/0/8/130873876/rewafu.pdfIn PDF document text
    • http://files.hiddengemcanada.com/uploads/1/3/1/4/131437236/a73e4.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/1/0437/1477/3147/files/94090457016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/91406232681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/rusimovomonuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/81620429657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/gigomufejulawexiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/52185441442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/2nd_edition_d_d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/63798613625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/wofapedirufije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/nutow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/xidesulilakixipimidubami.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_off00004815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4815 5068 bytes
SHA-256: 4f8ed9eaf151b9e6f9252e12c167117b888aead63afd12daf911dbef50412040
font_01_sfnt_off0000593d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 9892 bytes
SHA-256: e77ea6881f4712ff5c9deaf53c3c57642a75dbb7ba09e04124e48eb766637603

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