Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50236b11ce7604c…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 01:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76624d419e90441588a5258e3b8a6da8 SHA-1: 145cb0acbbfb4f4bdab48dff80d3137d296e5c00 SHA-256: d50236b11ce7604c339aa35bcb38a514915f56b06dfe234471978abb6035d5bc
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed for SEO manipulation, with one primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Oxford phonics world 2 workbook pdf free download' and the malicious URL, suggesting a lure for users searching for educational content. The primary malicious URL is ttraff.ru, which is flagged as a malicious redirector.

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/wix?keyword=oxford+phonics+world+2+workbook+pdf+free+download
    • https://static.usrfiles.com/ugd/b8c837_bf52e3c9035c4fc5ba97cdc78f330aad.pdf
    • https://static.usrfiles.com/ugd/278743_1654a4a81d0242b786dfa50779c06eb8.pdf
    • https://static.usrfiles.com/ugd/5b604d_e8c95a2ed9bf42d995b0f0d76040ab2c.pdf
    • https://static.usrfiles.com/ugd/7f46b5_2d166156b76646a5a8cfc453679ea0c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec91ed554d8b4c7890fbe5ab775b1a12.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/tanka_poem_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/86641545710.pdf
    • https://cdn.shopify.com/s/files/1/0433/4783/7083/files/dinonezewumoxuvasom.pdf
    • https://static.usrfiles.com/ugd/52b593_f23836b875f444f29cd313d7552839e3.pdf
    • https://static.usrfiles.com/ugd/ce14f3_2bc5659c438b4bbf9dc761648b7269e7.pdf
    • https://static.usrfiles.com/ugd/253000_dfb522efaa4845dd9382c1318c783096.pdf
    • https://static.usrfiles.com/ugd/d2751c_7d87371716dd439aa6b806d6c993cbb3.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_34f4d7f6aa974cb9a364135f66b8a6c0.pdf
    • https://static.usrfiles.com/ugd/3e87bf_76d675b9d97a461c8f19ed4e0bb73205.pdf
    • https://static.usrfiles.com/ugd/d17951_4e04de30cd6641acb11166cc6e1cc864.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_off00004771.bin
7040a30f118f749e2a1942ceea60851df870d2a29f28366afc9ac873516d24b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4771 5768 bytes
font_01_sfnt_off00005b17.bin
91e1f7e811adfd508d47cac7cd6a4997ff93967b4a9b556e93aafc094280c70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B17 9260 bytes

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