Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac8471b93f63637…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 23:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d95952ecba8f719d46a87749c43c6d15 SHA-1: 0c100a070d9df80ae9bb240eb96e1ebbfea707c6 SHA-256: 0ac8471b93f63637675bc9b16ab100f1e7e3e2e27748e33831609fa1d35629e0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a phishing or malicious redirection attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a high likelihood of malicious intent. Although no scripts were extracted, the embedded links and the ML classifier strongly suggest this PDF is part of a campaign to lure users to malicious sites.

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=academic+writing+pdf In PDF document text
    • http://mojenut.quantumeffectswitherika.com/uploads/1/3/1/3/131381078/59ba867ec.pdfIn PDF document text
    • http://files.treatsicecreamparlour.com/uploads/1/3/0/8/130814466/bc4b4a471f.pdfIn PDF document text
    • http://files.coastalvapers.com/uploads/1/3/1/4/131455158/667ccf9fa.pdfIn PDF document text
    • http://files.cottontailcottage.org/uploads/1/3/1/4/131408970/xutaxegowaki.pdfIn PDF document text
    • http://files.markwatsonwilliams.com/uploads/1/3/2/6/132695629/zulikaj-dulil-maguxajasowafu.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/1/0432/4291/3955/files/56002415729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/how_to_prepare_cash_flow_statement_direct_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/15594403211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/bsc_physics_1st_year_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/dobuzezarekofanudonokebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kamunikizesow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/68969251355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/gotham_font_family.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/jajif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/31724898310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/vofedazelakinitan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/pearson_mastering_physics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/49570720313.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_off00007668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 5344 bytes
SHA-256: 75164845d1089888a964efa3977b420c56e70afd62426f9071fa1701cdf39985
font_01_sfnt_off00008897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8897 10252 bytes
SHA-256: e11f2aa16d3efbcbcf24d7a8e1c1d4ed9ac84dc5298c1bcc2022548c86ab5c01

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