Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cf8dde941d6f39…

MALICIOUS

PDF

32.6 KB Created: 2020-08-18 14:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 438ac19514b17d3cf8e2d6cf511e0d9b SHA-1: 9f5b898852db325de13a5e88b2aff9f4f20ab6c3 SHA-256: 30cf8dde941d6f39332e9e9894f92f7fd53aa54c6492cde2cb1d168b73c9f93b
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware delivery. The document body, though heavily obfuscated, contains text related to 'sound barrier sheet supplier in singapore' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

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=sound+barrier+sheet+supplier+in+singapore In PDF document text
    • http://files.michaelakoll.com/uploads/1/3/1/4/131406849/6198911.pdfIn PDF document text
    • http://files.tomasosinski.com/uploads/1/3/1/4/131437246/80a374c93.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/1/0440/4481/2438/files/34205807975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/autocad_2010_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/99733011463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/vudagipirajakejobobudogar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/xagunakedowimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/schlumberger_petrel_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/98122122303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/30475137810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/xulaxonuxugivapuvudoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/duvipalosasobevopuxato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/71385944383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/bastien_piano_basics_level_1.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_off000042ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42AD 5464 bytes
SHA-256: a57797d3925b12a526aa1d939d56a2f30d17f785b64090f40d3890168753ceee
font_01_sfnt_off00005529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5529 9472 bytes
SHA-256: e15b9e82bc29dcea2c174babbc89e6ea75e43d3db72d63514db0719d38c8f515

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