Malicious PDF — malware analysis report

Static analysis result for SHA-256 509ffd696ea7bf4d…

MALICIOUS

PDF

53.7 KB Created: 2020-08-20 11:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c31b21b9abb5f216e0a8715147143b5a SHA-1: 182c94ba9b3a1484c83bccb9932fbf5c03d232f8 SHA-256: 509ffd696ea7bf4d7bdd1ccba66fe5e0794894c49f8a130280a912a9fc86dfc6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a 'lol pbe launcher' keyword. The PDF also exhibits characteristics of a link farm, embedding numerous links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL suggests an attempt to lead the user 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=lol+pbe+launcher In PDF document text
    • http://files.potomacschoolrobotics.org/uploads/1/3/1/8/131856160/9476628.pdfIn PDF document text
    • http://files.antstrategic.com/uploads/1/3/0/9/130969944/9080154.pdfIn PDF document text
    • http://lalofav.arlingtontherapyalliance.com/uploads/1/3/1/3/131383483/b22facfcf054cd6.pdfIn PDF document text
    • http://files.heavyrent.nl/uploads/1/3/1/3/131398591/duwewufu-vexatanakoloju-getonebid-dapazawoketu.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/1/0428/1060/5735/files/delta_baggage_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/nopezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/gst_annual_return_9c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/24134979195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/guwaminide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/lewapurolefiluzafazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/97301323466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/vunawutumozox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/zowutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/barron_s_500_essential_words_for_toefl.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_off00008f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F64 4924 bytes
SHA-256: 84313d6c24634870f6be9073d1916afcf613e85cad55f4bc9b845884b9a46288
font_01_sfnt_off0000a013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA013 13524 bytes
SHA-256: d89c413b80022c3d2f19b66e70ba1341c63f9d61e4c25cdda2522049cb985497

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