Malicious PDF — malware analysis report

Static analysis result for SHA-256 841525d50c4ca923…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 08:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9ed4706e3e477a0d8b1832d00938885 SHA-1: d4f2b68e6d3c29a763e70a4ab93fec8f90cf2e85 SHA-256: 841525d50c4ca923c4e6e89f06398983ea2e5b90f4a631d9ea17087c4f114642
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though obfuscated, contains text suggesting a lure related to "Tci history alive" and references to free downloads, aligning with SEO spam and phishing tactics. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a phishing or malware distribution attack pattern.

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=tci+history+alive In PDF document text
    • http://files.royalmarketingconcepts.com/uploads/1/3/1/3/131380741/997332.pdfIn PDF document text
    • http://files.horizonbrews.com/uploads/1/3/0/7/130775892/suminapu-subov-vugovebusasepew.pdfIn PDF document text
    • http://files.doubleglazinggosport.co.uk/uploads/1/3/1/3/131383837/260b57a5671d.pdfIn PDF document text
    • http://files.lifeandentertainment.com/uploads/1/3/2/6/132695329/4538649.pdfIn PDF document text
    • http://files.vonkaltbach.com/uploads/1/3/0/7/130739535/3199060.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/1/0431/3353/4357/files/nuzuvezenaxusidezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/voxalipoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/89609332464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/23264867480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/1072579971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/15779886045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/93146921690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/loselukifisek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/62177533120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/81283680533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/sorry_ciara_lyric.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 8

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_off00005d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 5000 bytes
SHA-256: d6d067ed027e7da06cb4386cd89bb38006b7c5432b2d86c780cb3e8ad929f998
font_01_sfnt_off00006e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 10460 bytes
SHA-256: fb2f5d487eb58c1b40575b07db31e6b3c2bfed1162c9cd3e846cd01511e1cd6d

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