Malicious PDF — malware analysis report

Static analysis result for SHA-256 284bbb813eb9e4b0…

MALICIOUS

PDF

110.5 KB Created: 2020-09-18 10:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d3a70eaf04654aab9c1ce52cf16cf9d SHA-1: c09d5cb5f117d8488a2b8e9547cfccbcebc9f588 SHA-256: 284bbb813eb9e4b0f084798418449678eb48f0c8d0bfc03d87a3f09569c89c9a
194 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. It also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDF documents. The primary malicious URL identified is ttraff.ru, which is used in conjunction with keywords suggesting a lure for game-related downloads. The embedded document body text is heavily obfuscated but contains the malicious 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.ru/wix?keyword=survival+chaos+wc3+download In PDF document text
    • http://files.keithgreenough.com/uploads/1/3/1/8/131871849/37fcdea2f929d00.pdfIn PDF document text
    • http://reredi.plastersurrey.co.uk/uploads/1/3/2/3/132303388/0377d8a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5bbad7f9-1c9e-4178-9af1-a6a8589c5fa2.filesusr.com/ugd/5b1e3c_32ffca99ac244e3b8ba2496c50fc52e8.pdf?index=trueIn PDF document text
    • https://1b3b383b-9f51-45bc-bc39-93c9bf571f09.filesusr.com/ugd/086daf_ab5c345008a845ed8d1e9f47d2e30783.pdf?index=trueIn PDF document text
    • https://2ea2beed-e086-4260-9744-c3a215d7c1e7.filesusr.com/ugd/b80405_540048ce39354b23b7f80fa220220a4c.pdf?index=trueIn PDF document text
    • https://42c58796-45ab-48c8-b5f3-208754c915de.filesusr.com/ugd/724fb5_879a5eaf80dc4c58a5400babd0a42208.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1399/9512/files/ahad_nama_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/anna_digilio_guided_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/riwefuxapinomenifofizosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/ridufixugidor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/82412877570.pdfIn PDF document text
    • https://6c244f5c-e64c-49e3-a56a-378d2530034f.filesusr.com/ugd/1acd69_72958b5bcad94f19bceccb5c69899866.pdf?index=trueIn PDF document text
    • https://db95c105-d8c7-46f1-9ddd-13923d4579fc.filesusr.com/ugd/353d00_093e48a98612433cad082a2810360015.pdf?index=trueIn PDF document text
    • https://d97cfc2a-a3c6-4bd7-b406-637e03eaf3f8.filesusr.com/ugd/bf0735_1cca1465c2fc40dba6e23796cf255caf.pdf?index=trueIn 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 1

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_off00017536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17536 5448 bytes
SHA-256: 074143da592b19127ba7091c486c09a196331e7e498afe550afb8d5e2ad6216a
font_01_sfnt_off000187c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C4 10808 bytes
SHA-256: a0b64a064de2b3af569ba6ec90de4bb8752fa94d0e9fca109e5ead92e345d6f7

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