Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc28b30a91c807d…

MALICIOUS

PDF

42.2 KB Created: 2020-07-31 07:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa27434fbc8502d1b16e2641b318f3dc SHA-1: 5108f2f1f5637462c3e03b690d2673ddae084454 SHA-256: bfc28b30a91c807d9a18ef2be3b619de8c1cdf0ec58b4ecb9356a2f36a5af2d9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links redirects to a malicious URL (ttraff.cc), indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to a book title, suggesting a lure to download or access content. The ML classifier strongly flagged this PDF as malicious.

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=grammar+and+vocabulary+for+advanced+book+pdf In PDF document text
    • http://files.fearless-compassion.org/uploads/1/3/1/4/131438616/3f256d7480302.pdfIn PDF document text
    • http://files.ecowisesprinkler.com/uploads/1/3/2/7/132741136/zobiviteru.pdfIn PDF document text
    • http://files.614fitness.com/uploads/1/3/1/8/131872054/bodifixoximavudovasa.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/57240799455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/31003003466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/xodudikab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/zidejote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/31052741230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/9372113653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/84290589491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/luzopowoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/20739974567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/92242644726.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 5

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_off0000652a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 5272 bytes
SHA-256: c192709251bbd7a2fbb411d12d21b671d55d4415416cab00eb58857c513f3123
font_01_sfnt_off0000770e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 11796 bytes
SHA-256: 007e96708aeddce3f773679f4e31fa88b93ac3ac1693fdcc992750a4eb6c6c0b

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