Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2858e2c83ae46d0…

MALICIOUS

PDF

47.5 KB Created: 2020-08-05 08:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67ed09be82d79ad332e90c706da34509 SHA-1: 40f8f52191faa71b54f72e53d04e95ef72ff0372 SHA-256: a2858e2c83ae46d091c4f37d18abac619ee6c954d7c70d3b0d29a2a20b6b3874
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'basic electronics notes' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious nature of the document.

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=basic+electronics+notes+for+first+year+engineering+pdf In PDF document text
    • http://files.nuimagedesigns.com/uploads/1/3/2/6/132682930/6978422.pdfIn PDF document text
    • http://files.timberlinechristmas.ca/uploads/1/3/0/7/130776661/6ee87c537c06d.pdfIn PDF document text
    • http://files.lanteahouse.com/uploads/1/3/0/9/130969922/suxes.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/1/0434/0390/3127/files/nrsv_with_apocrypha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/1664027787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/69845261404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/modifegagaputisamiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/baxaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/1538806589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/67468619612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/michigan_medicaid_provider_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/54236060237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/37426817200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/deposoweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4481/4500/files/febajaburodavokajonevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/xudaganer.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_off00007285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 5476 bytes
SHA-256: 84ead1a7e64264c9083138d5434308738598317062d49608f0af43f8aa87f4a6
font_01_sfnt_off0000853d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 13476 bytes
SHA-256: dc5adccb7082cc4edc6ac8941dccd1b50adecabbda488ac9de25542fd301057e

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