Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c54fad993148bd…

MALICIOUS

PDF

38.0 KB Created: 2020-07-28 23:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6af65e7bfc858dc57cdd9e4e2473319 SHA-1: 5aa3b9c4ec57a3e905faa78316559edd63cac36f SHA-256: b3c54fad993148bd856d929eabe991881a9767999fc98cd7579f7846f064629f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, disguised as a free trial offer for Aspen Plus. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO-based link farms used to distribute malicious content. The ML classifier strongly indicates 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=aspen+plus+free+trial In PDF document text
    • http://files.nycmetrostars.com/uploads/1/3/0/7/130738764/sumuwi.pdfIn PDF document text
    • http://files.missmaudiesmenagerie.com/uploads/1/3/1/4/131453595/28746f382.pdfIn PDF document text
    • http://files.thattruthspoken.org/uploads/1/3/1/6/131606260/xekutujelesijobojim.pdfIn PDF document text
    • http://files.capecommunityorchestra.org/uploads/1/3/1/4/131437454/0d6524e208ea9.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/1/0429/0550/1852/files/34517038142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/88180118107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/gerajinimuteperil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/39978161613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/xanejigosip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/68058056560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/linonoxojokaliludij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/febofelasusitavisivures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/35364022568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9027/8568/files/24747987436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8947/7278/files/muxemofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/sodotaxilevopen.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_off000058ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FF 4656 bytes
SHA-256: 29fc9a1ca686f9cf9f4f9eed525e1748293822e855520ff8a84f0bb3e846f74e
font_01_sfnt_off000068d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 10220 bytes
SHA-256: 076a2cc5ecbdb5d09f278a7c4ad6c47a59a605d9311a9e529832af952bbda090

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