Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28f22ab25867ce4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 16:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 691b2a087e82df2f756755d998655f8e SHA-1: 835ddcc00ac131823298bb57276da944d33a9955 SHA-256: f28f22ab25867ce48ce544d6a0374f8941c39c00ca9c2f9f3b661b039145d445
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The primary malicious URL identified is https://ttraff.cc/wb?keyword=cicatrices%20de%20acne%20pdf, which likely serves as a gateway to further malicious content or phishing pages.

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.cc/wb?keyword=cicatrices%20de%20acne%20pdf In PDF document text
    • http://files.blockislandhoney.com/uploads/1/3/1/6/131606123/7638481.pdfIn PDF document text
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdfIn PDF document text
    • http://files.bayviewlife.org/uploads/1/3/1/8/131856034/19d13123.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/1/0437/1385/5643/files/budapest_travel_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/bekewulamavegokam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/fomatadelowijinowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/vunonipasifuzaziru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9122/1923/files/mimezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/lusesipogis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/bobulelitedopapizizagina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/welabonik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/mezanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/nigibuxedovujasaduvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/66822924790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/68979104457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5934/6599/files/catalogue_asco_joucomatic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/gutojakiremewazin.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_off000066ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 5024 bytes
SHA-256: c5a03a47d4d9705c27fcf96227da9fd52df55176dcb6a00029eea1a884ab887d
font_01_sfnt_off000077df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10296 bytes
SHA-256: 23681ce356273546f53692be3d904dbe5af4a38714892736ab14d802d2107ec0

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