Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35578a0283aa591…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 04:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d7a5495ff9f78f693cf4ca37cbaf7ba SHA-1: e85186a4d7a0c3c026cbb9087b09c2f9a74745f0 SHA-256: c35578a0283aa591524839887c901671e675e60f08cf75cd835d10008d54b9e8
194 Risk Score

Malware Insights

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

The PDF contains a link farm, with one prominent link pointing to a redirector URL. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware delivery.

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=answers+of+ch+3+science+class+9 In PDF document text
    • http://files.vf-pkb.ch/uploads/1/3/1/4/131407164/7914513.pdfIn PDF document text
    • http://files.eedstanzania.org/uploads/1/3/1/0/131070434/38ff526c32c96a.pdfIn PDF document text
    • http://files.elitesandvolleyball.com/uploads/1/3/1/6/131636866/ginolerimujogafakoni.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/1/0436/4809/0270/files/ielts_reading_academic_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/kekoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0531/2163/files/betix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/critical_path_analysis_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/bsc_nursing_syllabus_mpmsu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/bmw_320i_2006_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/materi_belajar_gitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/dusefosutewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/fusionner_plusieurs_jpeg_en_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/leluxoruropemujimotelik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/amortization_questions_and_answers.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 7

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_off00006e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3B 5372 bytes
SHA-256: cccbc4b6fe1f691c55ab1aa4b093fdd90fe53dfcde44365d331f090e27d3bc87
font_01_sfnt_off0000807e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 10180 bytes
SHA-256: f82afccbc49d7b9027f285ce92d39f553c9a79b0e7aa01dc74eb988e7ac2e064

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