Malicious PDF — malware analysis report

Static analysis result for SHA-256 85410aa1ced45da2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 00:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02f765439fa0ca119db2dc6e43e65df2 SHA-1: de9b4b99ea8c7002dea80556777b5a4d3c8a6c98 SHA-256: 85410aa1ced45da2e94d0f64e5ab601bc7c5090289f1d5a2b9bec9984658c953
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead users to a compromised site. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the heuristic firings suggest a phishing or scam attempt, likely using a link farm to obscure the final malicious destination.

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.ru/pify?keyword=rename+file+unix In PDF document text
    • http://files.theguardianofnature.org/uploads/1/3/1/4/131453429/najozedunipa.pdfIn PDF document text
    • http://files.cmbbodywork.com/uploads/1/3/1/0/131070152/lefutatim_gudumexa.pdfIn PDF document text
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.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/1/0431/8534/0580/files/monikisolusodesapabod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/consecuencias_del_maltrato_psicologico_infantil_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/46223139411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/ditetomiwofazijakikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/45714195120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/92492921915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/birafojizadopofalut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/31431402133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/6892171032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/80600055646.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_off000067a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A8 4712 bytes
SHA-256: d18cac75f89ec5f0340b5e1deadf9821da3a619f707f310b21ed945ee5ce7f70
font_01_sfnt_off000077b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B1 13572 bytes
SHA-256: 1dbc6ede40774b160f4ea7752c1cc2dadf2a2f3c23c02e4f7764f7f028d812f5

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