Malicious PDF — malware analysis report

Static analysis result for SHA-256 4301d90a1f64cf3f…

MALICIOUS

PDF

107.9 KB Created: 2020-08-19 20:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07d146deccd1e9e33d1fd5e5e8818aa1 SHA-1: 2875ab37fedf1ff51051ded9f4ce1ed4582ff056 SHA-256: 4301d90a1f64cf3f7d48cbdbff04030c4826f469b288d2172cf19014ada7f600
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which points to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'C diff treatment guidelines 2018' and the URL, suggesting a lure to a malicious site disguised as a relevant document. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=c+diff+treatment+guidelines+2018 In PDF document text
    • http://files.monarchaccountinggroup.com/uploads/1/3/1/6/131636825/2906a68865.pdfIn PDF document text
    • http://files.kansascityamprepair.com/uploads/1/3/0/7/130775434/817abde80f29b.pdfIn PDF document text
    • http://files.noestansolos.org/uploads/1/3/2/8/132814900/jomizojiziporilisari.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/1/0428/9685/1111/files/pisutaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/38594105331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7735/2089/files/67545217742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3234/5765/files/12415786976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/19604575999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/14239284414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/mifupevigukufupetefudos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7623/9014/files/54755410713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/lung_arteriovenous_malformation_imaging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/23307922199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/nonafururugirafapu.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_off00015e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E29 5652 bytes
SHA-256: a11b306f8474097a70882d0a4b43916e1c7aec18238166d0308ace74f5a1e406
font_01_sfnt_off00017143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17143 16108 bytes
SHA-256: 6a2b00d586b807fd9bab11f3873f6173e20b3bc7b89aa2934489377f12507995

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