Malicious PDF — malware analysis report

Static analysis result for SHA-256 12925f29561702ee…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 22:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7df05557cf91431a389a5d47cfd79ff4 SHA-1: 121eab5fd89252a69ebb092bdaa351e6af2bd013 SHA-256: 12925f29561702eebda11f478e2590951a123d6e86599b13bfa5f43e84f93f0c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to an SEO redirector, which ultimately points to a malicious URL. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to lure the user into clicking it. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=first%20grade%20sight%20words%20dolch%20pdf In PDF document text
    • http://files.lovemehemp.com/uploads/1/3/1/3/131384335/redenuzozi.pdfIn PDF document text
    • http://files.mcvaymotorsports.com/uploads/1/3/0/8/130814644/sutibotumaneli.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/1/0431/2816/0413/files/jopevizemobaveko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4460/8920/files/arpeggio_patterns_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/28242603230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/edema_agudo_pulmonar_elsevier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/lulurolededelilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/zabeseromawofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4278/0837/files/28016143505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9154/0634/files/satabof.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_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5464 bytes
SHA-256: 39c7259b23a9073e5f4866f456b3f62b5909bfd1f1e20a7959817faaa35db0c5
font_01_sfnt_off000076ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 10516 bytes
SHA-256: bfb5924a0c84b0629f3234ea6cfb945df6e71c2ba34d18eccafd96e9ff1d49ee

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