Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5321a1c986e64d3…

MALICIOUS

PDF

53.8 KB Created: 2020-08-26 18:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b144e130f5297db82ec35625149ee5bc SHA-1: 844570babe632ee9cfabae988da46fb766a8a390 SHA-256: c5321a1c986e64d3d49ad838c806dc9574a45ca0225801aae31e24ee2140bc69
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bajrang+baan+pdf+download', which is flagged by heuristics as a malicious redirector. The presence of numerous other links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination. No scripts were extracted from this sample.

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.com/pify?keyword=bajrang+baan+pdf+download
    • http://jitalex.bigsauklakeassociation.org/uploads/1/3/2/3/132302978/mopaniwapini.pdf
    • http://files.julietownsendstudio.com/uploads/1/3/2/3/132302924/fokozevuk.pdf
    • http://files.professionalfacilitators.com.au/uploads/1/3/0/8/130873741/pavawapiz_vuvutametekewar_xipezupege_relutowelu.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/20783797254.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/barcelona_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/lista_capitales_del_mundo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/jejigukupoxam.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/binitawiweluwej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/86614397249.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/daxasaxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/biology_for_life.pdf
    • https://cdn.shopify.com/s/files/1/0465/2728/3358/files/14501701486.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/volefate.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/libro_etica_y_coaching_ontologico.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_off000062b0.bin
8bd0a4deab2bdca23b034ab2482bcba26b13e024b18ace6dc964172ad0df73e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 4928 bytes
font_01_sfnt_off00007382.bin
49a7b6a6022ad0750f3ce9b713f85c7cd2f2c955e32e46ddff28ce33b45939fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7382 3740 bytes
font_02_sfnt_off00007efc.bin
b80d67e6c643460c3282239bd9880a698f025850e701a1d9a89d8b9e71e1f3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 14132 bytes
font_03_sfnt_off0000ab3c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3C 4324 bytes
font_04_sfnt_off0000b93c.bin
46af7d0731d8d792b67b4384d0dd6b3cf3e68f285f626271eef0613b3f774d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB93C 4408 bytes

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