Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cf1ea651b05523…

MALICIOUS

PDF

52.9 KB Created: 2020-08-18 18:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0016a52d4a1da62975c0b3dcf9ab9bc6 SHA-1: a9d82ac08a31864ba73bdaae2b0a32900e797748 SHA-256: e4cf1ea651b055239d309d26215649d30cf63aaa9905dc4b87318f295f2912e6
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.ru' which is disguised as a download for 'Avira VPN Android APK'. This suggests a social engineering lure to trick users into visiting a malicious site. The PDF also exhibits characteristics of a link farm, with many embedded URLs pointing to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=avira+vpn+android+apk
    • http://files.dotexcanada.ca/uploads/1/3/2/6/132695620/pofavifugitaladepapo.pdf
    • http://files.rryardhubcaphobbies.com/uploads/1/3/1/1/131163774/a851a8bda456f.pdf
    • http://files.bigcreekbulldogs.com/uploads/1/3/0/7/130775431/vexepivujesu.pdf
    • http://files.jagodadobecka.com/uploads/1/3/0/7/130776408/5744682.pdf
    • http://files.seespotflorida.com/uploads/1/3/2/6/132695361/8817261.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/61341258806.pdf
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/40433532225.pdf
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/40536167367.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/56689100074.pdf
    • https://cdn.shopify.com/s/files/1/0436/2164/6498/files/avant_browser_free_for_xp.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/nebobewaxojos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/19805203972.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/14944730353.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/nuxilesowasorukalowiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/47012521950.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a0.bin
18d902f52f4f53955862795735abed03dd9aaf3f0d7a57a8946ad40012f6128f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 6496 bytes
font_01_sfnt_off000074a3.bin
928b2caa3655adc30fe81fa64135d16914a7bcd371408d6b9f603de32f5bfd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A3 5228 bytes
font_02_sfnt_off0000868b.bin
33b302b8a9b14e0a785b82194d9ab896f973e758f50a9d1fc506a7124d86d25b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868B 4856 bytes
font_03_sfnt_off0000971a.bin
debaf3ff37cadd88e03f56a1da1b20b0676acbb0c2dfc7de7569b922f44b7b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 1680 bytes
font_04_sfnt_off00009f67.bin
392b2da41f303aa502aedbf167449acb82775dbb5910f991bb2aa58607de286d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 12684 bytes

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