Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acf2dd6d495a5d2…

MALICIOUS

PDF

31.7 KB Created: 2020-08-15 07:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 712d5b27e5288aba7f27a2d9b5b8a066 SHA-1: 0bdf88f19f70658e909c7ef5126a66848be383bf SHA-256: 6acf2dd6d495a5d24917ffaa189bfade9b69b7d69f6b948c166dda3162ae73f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a redirector. This suggests a phishing or scam attempt to lure users to download further 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=ionic+bonding+worksheet+doc In PDF document text
    • http://files.agape-international.org/uploads/1/3/1/3/131398487/gebelopeponudo.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/1/0438/2159/6834/files/calculus_with_applications_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4124/files/anatomy_and_physiology_for_biomedical_engineers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/zujigunaruwif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/88384679683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/oxidation_and_reduction_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/pubivutil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pimifum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/11673135280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/how_to_win_cracker_barrel_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/90532154031.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 1

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_off0000404c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x404C 5192 bytes
SHA-256: 6349fb2cc28daa8f2bbbbce45a9b0e12f4499e1658fe41b69ca923f0fb916853
font_01_sfnt_off000051fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD 9580 bytes
SHA-256: ce7c81eba287a9fada2712a478e1923077c79d82859ce9579bc5deaad46d04c7

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