Malicious PDF — malware analysis report

Static analysis result for SHA-256 935a66e7422256b2…

MALICIOUS

PDF

47.3 KB Created: 2020-08-22 12:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ddc2f257808b7c2d740a1ed3129c74f SHA-1: 703ff5eeede6b885d4d67ed66f3bee9d7ef59f6a SHA-256: 935a66e7422256b2c87120d36ae76d57a0c68f5e434ddac62f445b8e1bf49221
202 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to external resources. One of these links, 'https://ttraff.ru/pify?keyword=porque+metformina+causa+acidosis+lactica', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a harmful destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=porque+metformina+causa+acidosis+lactica In PDF document text
    • http://files.egitimcilerdenbatikhikayeler.com/uploads/1/3/1/4/131453560/sitesenado.pdfIn PDF document text
    • http://files.northwoodssporttrailers.com/uploads/1/3/1/3/131398253/diwiridab-xanimatewa-dikij.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/1/0440/7571/2664/files/botovifunivazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/19712647646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4981/0070/files/wawimonilivef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/ditupupadinoxorizemux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7154/4223/files/a_course_in_behavioral_economics_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2367/0176/files/sbi_corporate_credit_card_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/31459437156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/44181547081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/8144312198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6217/files/zigogovapamagijoluvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/gojafubavejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/sowetegedavimesutuwa.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 1

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_off00007bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 5292 bytes
SHA-256: 6f020c476adf024c0ca70a5f1d91eb3d4e488714c6c8cf54b8c8c12f9c132556
font_01_sfnt_off00008d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9E 10228 bytes
SHA-256: c053407024f12f3a7edefc565c62328784587ac15edc6d3748ce3bce2466f261

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