Malicious PDF — malware analysis report

Static analysis result for SHA-256 790de0efbfebf42e…

MALICIOUS

PDF

72.2 KB Created: 2020-08-15 00:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80fe425641f9462069f4f354e7953f8b SHA-1: 52b5c566e3cfd5c4e30752148d08101b42823128 SHA-256: 790de0efbfebf42e54f0c9c72427962cdb216ed3279e449ceb59b72f74da6376
194 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to a malicious URL, likely for phishing or malware distribution. The embedded URLs and the ML classifier strongly indicate malicious intent, specifically a lure for free PDF downloads. While no scripts were extracted, the PDF structure itself facilitates the redirection, aligning with T1566.001 (Spearphishing Attachment) as the likely initial access vector.

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.ru/wb?keyword=pharmakologie%20buch%20pdf%20frei In PDF document text
    • http://files.nationalduals.org/uploads/1/3/0/7/130740183/rowebi_newefirigo_wevuzadi.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/1/0439/4467/3448/files/50425184194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7115/1007/files/calligrammes_guillaume_apollinaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/fosenonuvawanikifun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/rejuwuxekewux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/oakland_raiders_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/71882252479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/kajoxexakixemalunubafapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/26775609353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/aarti_sangrah_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/joxowitoj.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 1

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_off0000d177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD177 5596 bytes
SHA-256: b82c6c00515dcc19a28e9623ca0a50a438c7689ced7ab5540b5efdbc484d536c
font_01_sfnt_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 14868 bytes
SHA-256: d58f0990e78233e2532acab153c9e3bca13a48d0d492ac3b2e52ea47f36e5072

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