Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a47042eefb51c08…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 22:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe620a465ffe7aa78e137d740fbd873f SHA-1: 9487d5861d29a9a4900256b6b699b88e9dffbf49 SHA-256: 6a47042eefb51c08ed6c976d3d962cc70626741402f821d47cc3278bcd27a659
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final malicious destination. The primary malicious URL identified is a redirector that appears to be part of an SEO link farm, attempting to lure users with book titles. The ML classifier strongly indicates maliciousness, and the presence of multiple links to potentially malicious domains supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=algorithms+and+data+structures+made+easy+narasimha+karumanchi+pdf In PDF document text
    • http://vopipenux.vetrehabcenter.com/uploads/1/3/2/6/132683328/9714677.pdfIn PDF document text
    • http://files.vietnameravets.com/uploads/1/3/1/0/131070527/771ae.pdfIn PDF document text
    • http://files.welostthemap.com/uploads/1/3/1/4/131454305/940be5742535f.pdfIn PDF document text
    • http://files.bepowerpositive.org/uploads/1/3/0/9/130969402/7018831.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/1/0430/8497/2183/files/jitaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/63982821177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/50270226243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/giwebegorabimevotuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/98924277574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1628/0469/files/35081757551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/xiwuzufozidukatafurimigiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1759/1191/files/annotate_windows_open_source.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/zineru.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_off00005cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEA 5724 bytes
SHA-256: 30d66044f3152d9dfb5623ca65de734b712c789fca85894c3925144b22bc7f5a
font_01_sfnt_off00007047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 10064 bytes
SHA-256: 447197f853df6581ee000cf8014f5d5aa974fddd174c895eda9aac0a7cd3f3fb

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