Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c55cd9fb72ddbc…

MALICIOUS

PDF

38.2 KB Created: 2020-08-28 02:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d33c26535d6deda19075cd510982de79 SHA-1: 7018c7f46530976e458c99e7ea309ecb73f83458 SHA-256: 55c55cd9fb72ddbc100949bea9f1c7897fe4a918ed95c85cce299eb3c60fa47f
194 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or redirection tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link-based 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.ru/pify?keyword=senegence+foundation+ingredients In PDF document text
    • http://negok.first5460.com/uploads/1/3/1/4/131408970/peligoxakagoxaxilo.pdfIn PDF document text
    • http://files.toddpellandphotography.com/uploads/1/3/0/9/130969548/115791.pdfIn PDF document text
    • http://files.happycentric.com/uploads/1/3/1/6/131637402/futokiwubijovax.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/1/0433/5036/0232/files/89809229335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/video_background_eraser_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6694/1591/files/kazosinepenekiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3764/7002/files/xasuzemip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7163/8421/files/bahaya_merokok_bagi_remaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/telecharger_alter_ego_b1_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3285/5974/files/rorudugade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/79329763781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/zavotabufigedijam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/xazozag.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_off000056e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 5260 bytes
SHA-256: e8a48fea93fba7f23c7378fa36ff7689bed96c77276b7acb6af50baf7b4fe8b7
font_01_sfnt_off000068cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 10336 bytes
SHA-256: 60ffbbd51a9265a5de496b679e5c33dbb90b53b122842dabf50c82cfe10b6de2

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