Malicious PDF — malware analysis report

Static analysis result for SHA-256 37636ff64eed52d6…

MALICIOUS

PDF

55.0 KB Created: 2020-08-07 23:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c08fda065d7b132008fef7bb2601f797 SHA-1: 30ad03a63c5febc0c0d10681c602e34517f25971 SHA-256: 37636ff64eed52d622567b8fac1e5dede1757e50c139fc1739f443531f95b47d
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate study material, but the primary link redirects to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the target URL, suggesting the PDF's purpose is to drive traffic to malicious sites.

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.cc/pify?keyword=ccna+200+125+pdf+book In PDF document text
    • http://files.audreyalejandro.com/uploads/1/3/0/8/130873876/padezurivulem-lopixunojeduf-jotibinalagebi-tusijotowi.pdfIn PDF document text
    • http://files.vrbeforeitstoolate.org/uploads/1/3/2/8/132814146/15036894e.pdfIn PDF document text
    • http://files.alivesoap.com/uploads/1/3/2/6/132681769/zidisawewe.pdfIn PDF document text
    • http://files.groennfell.com/uploads/1/3/0/9/130969300/303fe0908.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/1/0428/5172/9574/files/pusatuxegux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/fedefivutukorekavuliko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/fozabaxoganekovoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5957/6986/files/jewojazumerim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagitigupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/using_windows_terminal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/bank_aptitude_short_tricks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/durapek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/97396988930.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 5

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_off000097dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97DC 5404 bytes
SHA-256: 06d3bd731460dceac913ecfcb7f15e4d322530f9683971384d02b6e773fedee8
font_01_sfnt_off0000aa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA59 10820 bytes
SHA-256: e60164956527b700bba0de34d426af01bd8f31533cdb62240c94b5ae9529737a

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