Malicious PDF — malware analysis report

Static analysis result for SHA-256 c949b5b7e4b85845…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 07:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9aa26356bf0e24e7b0b640fae228974c SHA-1: 36e9b20899103da1de2b1e4584abf797cd8b2970 SHA-256: c949b5b7e4b85845f2fb5f03fd54ce3099f6c1540ce41a603424428005f4426d
194 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link and a large number of embedded links pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=callen+thermodynamics+solutions+pdf.

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=callen+thermodynamics+solutions+pdf In PDF document text
    • http://files.gabriela.is/uploads/1/3/2/6/132681698/fuwexubekoli.pdfIn PDF document text
    • http://files.lifewithbackpacks.com/uploads/1/3/1/6/131636834/9048451.pdfIn PDF document text
    • http://files.crissysimon23.info/uploads/1/3/1/3/131384568/ledoxovito.pdfIn PDF document text
    • http://files.alzglassandiron.com/uploads/1/3/2/6/132682564/gadiloxi.pdfIn PDF document text
    • http://files.onionmanproductions.com/uploads/1/3/2/7/132710659/6826410.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/1/0430/0832/7829/files/pivivelaposorijotopojivoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/xivavipofititux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/7950393062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/46269713283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/radelatupobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/gumos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/18722033660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1209/4109/files/ravuzero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4668/0214/files/basic_javascript_counting_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/60789893023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/stardew_valley_crop_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3215656586.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_off000058ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EC 5404 bytes
SHA-256: c19721e5cfc83ec1365aeaaa84a5415620cb53877c8a58ca2c76da03f75ebc21
font_01_sfnt_off00006b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 11900 bytes
SHA-256: 395de8e707744df8df18587fd9feb1cb881b151c6f04ac30ae57b3c83db8113b

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