Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3750959dd459a38…

MALICIOUS

PDF

89.2 KB Created: 2020-08-12 22:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1458ff6695de2912ed05046920cc93ac SHA-1: d9b4acfe9d2795939c3a64a131aef06149f1cb7b SHA-256: a3750959dd459a38dbe774af981fc5f908c98dc89fa1c0a94928b55d520cfca8
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a malicious intent. The document body, though heavily obfuscated, contains text related to a 'CEH certified ethical hacker' exam guide and a URL that appears to be a lure. The presence of a SE_ADVANCE_FEE_SCAM_LURE heuristic further supports the conclusion that this document is designed to defraud the user by promising a prize or service in exchange for an upfront payment.

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.ru/pify?keyword=ceh+certified+ethical+hacker+all+in+one+exam+guide+book+pdf In PDF document text
    • http://files.foodwithvega.com/uploads/1/3/0/7/130739621/7126862.pdfIn PDF document text
    • http://files.williamjanelle.com/uploads/1/3/2/6/132683328/gepevalazolifa-luxefikateka.pdfIn PDF document text
    • http://pubud.hsi-electrical.com/uploads/1/3/1/3/131381464/burisoxaroget.pdfIn PDF document text
    • http://files.studiosix.biz/uploads/1/3/2/6/132681164/3e0cf.pdfIn PDF document text
    • http://domopalep.blairtherapies.com/uploads/1/3/0/9/130969060/507177.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/1/0431/7301/9808/files/linonusifogifazuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/muruxiwulodavatiginisitov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/loxilexedafagadugudiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/how_do_you_use_sprites_in_processing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/48739007007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/mathematics_syllabus_d_book_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/wamab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/61948836120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/lagokuw.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 3

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_off00011f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 5568 bytes
SHA-256: 02debc2b58dcf3602e8593e61e0f0c840fa57353b52a8274a0d9908efe8dd19a
font_01_sfnt_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 11032 bytes
SHA-256: 7c9ae9c74e24525fcfe832c05c3b420b012429f839f8057669d3a9b518593536

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