Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8db8a3f5ce53e8d…

MALICIOUS

PDF

48.5 KB Created: 2020-08-19 01:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5437e7334bcc3cf34d43cdf51f137c08 SHA-1: 80ff18ca9751c2a967cdc77c29a205cbe6384685 SHA-256: d8db8a3f5ce53e8d507877656c18bbe323399af22ffdbca199496ba407b9c289
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites. The PDF structure and the presence of numerous links are indicative of a link farm or phishing attempt. No scripts were extracted, limiting the analysis of direct payload execution.

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=ark+metal+tree+platform+extinction In PDF document text
    • http://files.neurosurgerytraining.org/uploads/1/3/2/6/132682851/da334c5d.pdfIn PDF document text
    • http://files.waynesburgcentralbands.org/uploads/1/3/1/4/131453284/f8f3b75b9.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/1/0430/6573/7370/files/nutamutedawowimusiwudufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/check_your_english_vocabulary_for_banking_and_finance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/acrobat_reader_and_editor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/welonuramideg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/10907993653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/upkar_ntse_book_class_10_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/33769540422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0155/0760/files/58055171630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/497687380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/sabawube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/61469535483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/68967450334.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 2

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_off0000800e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800E 5104 bytes
SHA-256: e9565c2a7fbd1b4c523d03da7d6f150bca1ed8db76159191fa5a198482ed5898
font_01_sfnt_off00009154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9154 10592 bytes
SHA-256: 76b9fcacd28e312823ee9deff703577584eb34fede4061df574faf1eb28624e5

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