Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28b86ab26eb8891…

MALICIOUS

PDF

52.0 KB Created: 2020-08-09 08:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 815a0cbc9868f4b98bf557d14b0da48b SHA-1: 15836d6efdd52d1c489b2ce1c6815aa7128e205a SHA-256: e28b86ab26eb8891829d37283eae3c0abaede1d8f73b7ee43b69ae63f3d0dab7
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a larger scheme to manipulate search engine results or distribute malicious content through a high volume of links. The primary malicious IOC is the ttraff.com redirector URL.

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=abecedario+en+ingles+para+imprimir+pdf In PDF document text
    • http://files.taichilab-cambridge.co.uk/uploads/1/3/1/3/131378915/a0e2ee.pdfIn PDF document text
    • http://files.danvaningen.com/uploads/1/3/2/6/132682030/juxonomedugobep_relebekeku_xasot.pdfIn PDF document text
    • http://files.kerikeriguitar.com/uploads/1/3/2/7/132712050/4841412.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/1/0432/1450/4093/files/nutelosumezebepane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/75587566952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/dolet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/38646691854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/vovusigedirukolivupep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/competncias_e_habilidades_bncc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/90253373125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/sakemedujufifuwetomidoxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/vegetogetixizagegomulotiv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 5604 bytes
SHA-256: 591605c85382ec74a45492d6f799e69af36ad6b347cb96b7132b9743f674a697
font_01_sfnt_off0000848a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 11832 bytes
SHA-256: 4b66d1bef420c583bf52c2e3893667af04a0cfb2facbf00af88e5b94445a6376
font_02_sfnt_off0000aba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA2 16340 bytes
SHA-256: de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff

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