Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ff0dfac6ee666e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-22 03:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed847def911b44b2e5406d968d2f83c8 SHA-1: efb9405f89ada5a4c4436a495d1040da806b6b6e SHA-256: a0ff0dfac6ee666e5f3a490aea06c25a88e51f85633b75393ccd13e920f00e2e
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates a link farm strategy, likely intended to obscure the final malicious destination or to distribute malware. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious content. While no scripts were extracted, the heuristic firings and embedded URLs strongly suggest a malicious redirection attack pattern.

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/pify?keyword=cammy+street+fighter+android+wallpaper In PDF document text
    • http://files.communitychristianaugusta.com/uploads/1/3/0/7/130775649/a39153d5a.pdfIn PDF document text
    • http://files.poseidonwater.com/uploads/1/3/2/6/132682790/vevogapejud.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/1/0429/2021/4681/files/23171319707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/5127665341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4507/7671/files/name_reactions_in_organic_chemistry_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/alternate_angles_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/wazaridasesini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/jofatigasenoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/35150745654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/ygdrasil_jorge_baradit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/digestive_system_ppt.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 6

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_off00005bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 5552 bytes
SHA-256: 77571904afb2cc68f250afe2bcb4ab2743b693fad00d63e92a50a71c0930451f
font_01_sfnt_off00006e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8C 10156 bytes
SHA-256: ca0ac086523401c3a5c2f95e0172d99e3e9c56f65c39c3a86ce43934ac9c8f14

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