Malicious PDF — malware analysis report

Static analysis result for SHA-256 5caa20ace1d8b670…

MALICIOUS

PDF

45.3 KB Created: 2020-08-02 10:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06d30b5326854332cd28407a22fc5178 SHA-1: acf3b89c83a02e58c225988a2bc24507906461d8 SHA-256: 5caa20ace1d8b67097a8ffc4f2fee0667b9b3fc8c3631629b5da7f9eb42eb2d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to a redirector service that is designed to phish users with a fake software download lure. This redirector is likely intended to lead users to malicious content or further compromise.

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=install+spark+on+mac In PDF document text
    • http://files.sebastianmusic.org/uploads/1/3/1/3/131383727/819162.pdfIn PDF document text
    • http://files.sathiavanee-veeramoothoo.com/uploads/1/3/1/8/131871891/jidutemepupaz.pdfIn PDF document text
    • http://files.terrifraserstudio.com/uploads/1/3/0/8/130874015/1185349.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/1/0430/2995/4721/files/deribawolulolerotevupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/retroarch_netplay_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1832/files/xejefidubekog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/figiselenituxelogidis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/96262050049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/vadasak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/zapeketipofozizomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/xakigajesupulabinexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/80521309621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/71716364920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/19414558417.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_off0000742f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 5080 bytes
SHA-256: 54cd496ece90d1946bde1de3d05c543e70f5b7a8c001be7a5826dd8b5a57d6a4
font_01_sfnt_off00008565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 10300 bytes
SHA-256: 202f086346554723c4d06ae43160f542b0ac630bb1e1134307a8d3c09fae2b30

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