Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4252f9972953c5d…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 19:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1af9ccda202c014d946820feb1df0cf SHA-1: 60d635a7204f85a30b1e6684366d3bf54deaa535 SHA-256: c4252f9972953c5dad300122712522e7193cf61395ef9b6b4f82aabe2dd14db3
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector at 'https://ttraff.ru/pify?keyword=f+alphabet+wallpaper'. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many hosted on Shopify, suggests a tactic to obscure the ultimate destination or to leverage SEO for traffic. No scripts were extracted, but the primary attack vector is the embedded malicious link.

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=f+alphabet+wallpaper In PDF document text
    • http://files.clareslaneycounselling.com/uploads/1/3/0/8/130874257/8224303.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/1/0450/8103/4917/files/emma_msrb_org.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/buku_akuntansi_perusahaan_dagang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/50250885822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/muwolajeligopamabezilisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/vikujinutufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6695/6707/files/44630875955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/21418381634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/32163334360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/6180630748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/48939454446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/dining_table_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/erase_your_social_lyrics.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_off00006080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 4916 bytes
SHA-256: 55230f6d5f7ca221cba89e1dfec6100bf748e501cd0a6b5019f612bc8d2d7b25
font_01_sfnt_off00007144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 10476 bytes
SHA-256: dc42734061510d73b799dd4a4e3d8a12e60a13acf54a4c455be07cb7d62995cf

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