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)
MD5: 53f02d1406539aa36b45f4c9a3f52edb SHA-1: 24707d6379decec22103407843b48ad18feb38da SHA-256: cedb6674a313833d889b2c0224a60aa3770f77d4e5973468ce87bcf3ab6f0464
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.thespeculativekitchen.com/uploads/1/3/1/4/131483154/fe9e5f58608.pdf
    • http://files.scsvntp.com/uploads/1/3/1/3/131380005/rurijuri_tabuga_kewusulux_pesuxukebum.pdf
    • http://files.debbiejackson.org/uploads/1/3/1/8/131857983/mejoki-nutikuzo-bopebev-zudazeporarib.pdf
    • https://cdn.shopify.com/s/files/1/0432/7725/4814/files/komezerevobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/fakexofapoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/tigimupej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/66123725845.pdf
    • https://cdn.shopify.com/s/files/1/0433/9449/8709/files/4576728271.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/mesutaduxedusufavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/72478543383.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/sobipebalililumupo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d2.bin
09a49a88d1141c56a99eb61aca1aea8117bbea6685add89c978b1e91a4b81e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 5160 bytes
font_01_sfnt_off00008567.bin
4560f8bee50725e10554809150f8c798fca51c652633b03721dd021720773fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 10852 bytes

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