Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aad51bc4ee4d4c8…

MALICIOUS

PDF

49.9 KB Created: 2020-08-09 14:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c0fe0bff5c16b4de035957b1c7cca5 SHA-1: 68f3b298e861af4f585eb092cb5a5bfbc29513c2 SHA-256: 7aad51bc4ee4d4c88f66dc0a2f446c01daedc14d22f51da888e7b92d0ec3f12e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=malayalam+kambi+kathakal+novel+pdf+download', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Malayalam kambi kathakal novel pdf download', suggesting a lure for users seeking specific content. The presence of numerous external links, including those to Shopify, indicates an attempt to create a link farm for SEO manipulation or to distribute further malicious content.

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=malayalam+kambi+kathakal+novel+pdf+download
    • http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdf
    • http://zutuvox.photosfrommyheart.net/uploads/1/3/2/3/132303382/643d4b7ae959f.pdf
    • http://files.neosvf.com/uploads/1/3/2/7/132741535/vixegi.pdf
    • http://files.sharonlewis.net/uploads/1/3/0/7/130740231/nubakadabulagevilag.pdf
    • http://wapexofud.reikifortheplanet.com/uploads/1/3/0/8/130814017/2531b11c7ef64.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6527/files/cask_of_amontillado_original_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/jabag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/78575440767.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/unclaimed_property_arizona.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/11590774984.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/zimafuvujitov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/mokeremezedufukuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/54963332842.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/xirunusodagizis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/vuzadedagorovewigadakuro.pdf
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/panduan_belajar_excel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ff.bin
59907c97e7de94b01d4cfea335e39aa2071ad6a136861f5ef9b9ba5fb0ce72a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 5472 bytes
font_01_sfnt_off00006c94.bin
a83809741a581554dccd896128fff85b7d2be60dd8da5b1acaca63cccc977426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C94 9444 bytes
font_02_sfnt_off00008c46.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 2140 bytes
font_03_sfnt_off0000961e.bin
ee10df1609b989cb8c754017234e4902f6d8db5ba79b852495204ea443d24013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961E 10348 bytes

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