Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f239cfb184b677…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 02:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a561028faf88d62da5553e60c5eb2cd SHA-1: d285aeddb95739d4b242e8f3148add5eb60f62d1 SHA-256: 52f239cfb184b677603751403fe914cbae3adddc49c37a54b239961382539dc0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious link, 'https://ttraff.ru/pify?keyword=cpr+guidelines+1990', is presented within the document body, disguised as 'Cpr guidelines 1990'. The document also features a link farm heuristic, pointing to a large number of external PDFs, many hosted on Shopify. The overall pattern suggests a phishing or redirection attempt to a malicious site.

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=cpr+guidelines+1990 In PDF document text
    • http://kutubaba.aoifekane.com/uploads/1/3/1/6/131636725/fijuwufosinawug.pdfIn PDF document text
    • http://dalefegen.phyllisthompson.net/uploads/1/3/1/1/131164250/pewudefojuximixogafe.pdfIn PDF document text
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.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/1/0433/4744/3865/files/josux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5443/0368/files/60087854285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/literary_terms_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/youtube_video_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/telecharger_les_journaux_algeriens_d_aujourd_hui_en.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/double_sided_business_card_template.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_off0000670c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 5172 bytes
SHA-256: 3b1dec21613b11d6a8762aedbfec20df4c155a28497849cc8de021bd6e9568e7
font_01_sfnt_off000078b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 10452 bytes
SHA-256: afc3e4589b144a3442a0774d97ad0697890b1903b7e51a8f29ef9e3198035a32

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