Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26a8ad226f22b67…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 03:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0564573fcf08c5bc4a495c8aa102bdeb SHA-1: 0a7012db980564af33b4c968fbdcfd86919a02cf SHA-256: f26a8ad226f22b67cde49e81174fd626be466d2c3303fc87a95a35674f47bdda
194 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a link farm, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL, https://ttraff.com/pify?keyword=associa%25C3%25A7%25C3%25A3o+brasileira+de+normas+t%25C3%25A9cnicas+pdf, is a redirector. The document body contains a mix of garbled text and URLs, further supporting the link farm and redirection attack pattern. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=associa%25C3%25A7%25C3%25A3o+brasileira+de+normas+t%25C3%25A9cnicas+pdf In PDF document text
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.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/1/0431/4474/1024/files/zetotugik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/39770800637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0685/9176/files/camerafi_live_free_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/9975/9268/files/witad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/avast_antivirus_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8431/6823/files/plan_b_candy_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4528/9127/files/tonemesagewoduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/99864173943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5266/6778/files/mass_moment_of_inertia_derivations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/gabuxi.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_off00005d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 6072 bytes
SHA-256: e599646ba5ab3f6af009eb2108d0e65c2d0c2eca28944d7e0ff0421b3ec591e5
font_01_sfnt_off000070cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CF 11840 bytes
SHA-256: f92edb14c979f938ce5739fb41c14a73d8af7fef68b36f914e9cc490c246274a

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