Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d373879e36b36b…

MALICIOUS

PDF

43.1 KB Created: 2020-10-04 09:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-06
MD5: 78cf80062cdc71bf3ba1eecdb835c109 SHA-1: 6f8a09a57457f2bed7903bfbfc4bd14d8dd4703f SHA-256: b5d373879e36b36ba88f413454771d4c44ae145facf2943397feaec555c89dc5
194 Risk Score

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://ggtraff.ru/strik?keyword=himno+a+san+juan+bautista+letra In PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/48583531505.pdfIn PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/73631159943.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/simodafaxa.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/46262974005.pdfIn PDF document text
    • https://site-1043917.mozfiles.com/files/1043917/66036758620.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/borepajap.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/ropekovajekonevalapa.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/daravomipetujuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000068ed.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000068ed.bin)
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/lovikugugeragojikeroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6668/3292/files/deductive_reasoning_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/ragnarok_m_beginner_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0533/2634/files/samneric_quotes_lord_of_the_flies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/area_model_division_worksheets_5th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/rosapotowejudomavowafamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2457/5396/files/ap_calculus_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0436/1366/files/jufigoreva.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 extracted file (font_00_sfnt_off000068ed.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68ED 5008 bytes
SHA-256: fa287bb291b993320b605c14caa2c70ade7eda87b1f437deb24bb9f97468701e
font_01_sfnt_off000079d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D6 11160 bytes
SHA-256: 52006c9e0186d22995a0f23f253bf92e472c2c70f9a64951c9960da1e5641655