Malicious PDF — malware analysis report

Static analysis result for SHA-256 de237423c3f762fa…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 05:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e43237293367d530848817f045334684 SHA-1: d4de13195bf67094c6f0187f8c8a7e49dc5d46ae SHA-256: de237423c3f762faf77a13ed2b9cc4106d6cb89b987f62a584f639b13a410b7d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'articles on social media marketing pdf' and embedded URLs, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent to redirect users. No scripts were extracted from this sample.

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=articles+on+social+media+marketing+pdf In PDF document text
    • http://zabomuv.schgocbkp.org/uploads/1/3/1/3/131379373/f8373b4c78b838.pdfIn PDF document text
    • http://files.oceanstatebirdclub.org/uploads/1/3/1/8/131856170/genanejelolopagi.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/1/0438/1959/7981/files/89004632125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/44375931973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8384/1190/files/vivopezejerugibawalir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/21869307723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7886/8387/files/cetosis_bovina_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/86727602308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/rimexitojopewisazikid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6811/9445/files/koliledilolut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/1290585889.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 3

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_off00005d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D91 5528 bytes
SHA-256: c8bd5f1bd1d9f92b6db3ea51b6a99223b6c93240a909b0a28c5245a7142e68f6
font_01_sfnt_off00007046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 10392 bytes
SHA-256: 5822669c8d506fdb98f8e51f7c10bf1df8886afe628ae74c55b7ed3ab060abf6

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