Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5a8c50d2c40642…

MALICIOUS

PDF

50.4 KB Created: 2020-08-22 05:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35f6a7156d8b56c8988567072372890d SHA-1: f607a143fd50d4cb214b09719935a36fc1dc287f SHA-256: 5c5a8c50d2c406420fc28200df61150a1585938f0b75c026f07b46e3c4e6aefe
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The embedded document body text includes a URL that points to a known malicious redirector, which is likely used to obscure the final destination. The ML classifier also 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.cc/pify?keyword=asturias+tab+pdf In PDF document text
    • http://wudexoto.elizabethtabish.com/uploads/1/3/0/8/130813528/5154119.pdfIn PDF document text
    • http://files.molyneauxlawfirm.com/uploads/1/3/1/1/131163872/4252963.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/1/0432/2813/5592/files/31342044332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/41597305638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/anatomia_y_fisiologia_del_pancreas_endocrino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/76856913716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/5539394078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/formule_apertura_lettera_informale_inglese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2960/1178/files/ruduradumajamepevup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/suleki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/sesaregudit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA3 5132 bytes
SHA-256: cc5f4a9e854046212e74e05bf90966818cabffa5307dd1d8af7e701c8bd593b3
font_01_sfnt_off00007f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1C 12824 bytes
SHA-256: 1b7d9bfbe192004c780fc789b1cbdc2e9cbb72762c274ce5c1ecc49cdd1481b3
font_02_sfnt_off0000a80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80B 16132 bytes
SHA-256: d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7

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