Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedb6674a313833d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-01 09:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53f02d1406539aa36b45f4c9a3f52edb SHA-1: 24707d6379decec22103407843b48ad18feb38da SHA-256: cedb6674a313833d889b2c0224a60aa3770f77d4e5973468ce87bcf3ab6f0464
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a keyword related to 'codes for club penguin'. This indicates a social engineering lure. Additionally, another critical heuristic identified a PDF link farm, suggesting an attempt to distribute or obscure malicious content. The document body, though heavily obfuscated, also contains the same 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/pify?keyword=codes+for+club+penguin In PDF document text
    • http://files.thespeculativekitchen.com/uploads/1/3/1/4/131483154/fe9e5f58608.pdfIn PDF document text
    • http://files.scsvntp.com/uploads/1/3/1/3/131380005/rurijuri_tabuga_kewusulux_pesuxukebum.pdfIn PDF document text
    • http://files.debbiejackson.org/uploads/1/3/1/8/131857983/mejoki-nutikuzo-bopebev-zudazeporarib.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/1/0432/7725/4814/files/komezerevobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/fakexofapoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/tigimupej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/66123725845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9449/8709/files/4576728271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/mesutaduxedusufavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/72478543383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/sobipebalililumupo.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: asteadyhandfoundation.org 4 samples

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_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 5160 bytes
SHA-256: 09a49a88d1141c56a99eb61aca1aea8117bbea6685add89c978b1e91a4b81e80
font_01_sfnt_off00008567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 10852 bytes
SHA-256: 4560f8bee50725e10554809150f8c798fca51c652633b03721dd021720773fce

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