Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e4ce4d52f7e2ce…

MALICIOUS

PDF

45.3 KB Created: 2020-08-15 07:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f3436b99142ca4f4ec564890358605a SHA-1: 4d58c6d384fbebc86268c7b7fb98a88d5388b069 SHA-256: a7e4ce4d52f7e2ce58f1c432e499c75fbf68ee1a08b5e914ffb542d0f4b1439a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'cyberbullying prevention pdf', likely intended to trick users into clicking the malicious links. The primary malicious IOC is the redirector URL, which is used to funnel victims to further malicious infrastructure.

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.cc/wb?keyword=cyberbullying%20prevention%20pdf In PDF document text
    • http://wezupapo.southislandecebc.com/uploads/1/3/0/7/130738870/c76c7a3b696.pdfIn PDF document text
    • http://files.strongteams.net/uploads/1/3/0/7/130739444/2585744.pdfIn PDF document text
    • http://files.3sistersgrace.com/uploads/1/3/1/4/131453348/9490340.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/1/0437/7768/7706/files/71166697194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6833/2968/files/bach_chaconne_segovia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7789/2264/files/richard_bandler_and_john_grinder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/31730642436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/dinugipunobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/23830992620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/mods_minecraft_1._8_forge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/candy_candy_final_story_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/funuteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2667/3827/files/caida_libre_fisica_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/bisadededakavufafi.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
🗂 Part of campaign: 3sistersgrace.com 3 samples

Related samples 5

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_off0000756e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 5028 bytes
SHA-256: 4b943128520b1e863ef20af229bb12648b6d9cf7b843f5235ae2328104261fa7
font_01_sfnt_off000086a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A1 9876 bytes
SHA-256: 1129e3230c5c039a4f131991e869ba826015a0f677be358d0696c13d8f6ba87a

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