Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c78e3920afe3e84…

MALICIOUS

PDF

41.6 KB Created: 2020-09-18 17:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e9c4a2da9cab943b7666e0f696bf461a SHA-1: 6e01c77464a294aac4328fa9d36192576ecd4c59 SHA-256: 3c78e3920afe3e84d6065e147d6ac013f2a33f9133ac50c499e5bb1017e56117
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'American vision textbook' and includes the primary malicious URL. The presence of a link farm and a high ML classifier score further support the malicious classification. The primary intent appears to be redirecting the user to malicious infrastructure via the embedded links.

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.me/wix?keyword=american+vision+textbook In PDF document text
    • http://xomozir.greatchishillpc.com/uploads/1/3/2/7/132740494/2451718.pdfIn PDF document text
    • http://files.elshaddaiworldoutreach.org/uploads/1/3/1/8/131858287/rujobikisubuzedage.pdfIn PDF document text
    • http://xomuwam.100womenwhocaremedina.com/uploads/1/3/1/3/131379246/8659107.pdfIn PDF document text
    • http://merujonu.aquaattack.net/uploads/1/3/1/6/131637649/jirufap_pivud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e71e43f-cfe4-4319-8672-d392dd7b3625.filesusr.com/ugd/97493d_56e225b194974ee9b38a2d00dacddf02.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/icao_annex_14_volume_2_heliports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/simizubusexox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8373/8525/files/54513916401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3721/2319/files/bigenogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/addis_ababa_city_population.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/ibm_cognos_tm1_developer_s_certification_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/ornamentation_in_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/wefedabedigikuvejaru.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 2

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_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 5232 bytes
SHA-256: c296cd892346e131ebabf08304a39827c9977b3cc63e14a646c2424987bca329
font_01_sfnt_off000074e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 10412 bytes
SHA-256: 4a41ec35feee3d69613d7a4129c2a4737214fdb32874b619acd262db0f0fcb39

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