Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b93ccebe81ef972…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 11:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01f3c6e756619905338c98e7ae0e766f SHA-1: c71186a14875571e6063175d46c66b3d96cd52cd SHA-256: 9b93ccebe81ef97283fad45f28e3e5f073c6269f11097596e37c6d99bf56fdb0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector link disguised as a CCTV installation diagram. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other SEO-optimized PDF links, suggesting a phishing or redirection attempt to a malicious site.

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/wb?keyword=cctv%20installation%20diagram%20pdf In PDF document text
    • http://files.simonheptinstall.com/uploads/1/3/1/3/131381679/vivijunipe.pdfIn PDF document text
    • http://files.newteachersretreat.com/uploads/1/3/1/0/131070374/kojesiribesenigewuru.pdfIn PDF document text
    • http://gegelafo.theohanadivecompany.com/uploads/1/3/0/7/130738731/zifajamorekati.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/1/0429/8070/4405/files/51992817792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/bangkok_thailand_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/milemuwesiwanowolufef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/aims_and_objectives_of_partnership_firm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/ashampoo_burning_studio_18_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/87996368750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/44687393156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/barriers_to_curriculum_innovation_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4590/2746/files/pexumuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/66211773687.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 4

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_off00005bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5440 bytes
SHA-256: ddd9e90a478e8dd87da0d945070a8c1b3ae97d3dc57576927513b6555ff39e9a
font_01_sfnt_off00006e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 10076 bytes
SHA-256: bb00ddfadd3836357b6f7ad0949fa53fd50b12228a2180b1e6724ea9e63f231e

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