Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac59979893e7c32…

MALICIOUS

PDF

69.3 KB Created: 2020-08-07 00:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51ea7a999975fd06448303c852ba85d9 SHA-1: 549e30a80cf77d6fda4d86e1488f2f3083709ac7 SHA-256: 4ac59979893e7c32dd745543dbef932ee6d6adc27679a88ae39f64af0513dc5e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=historia+de+la+contabilidad+financiera+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute links broadly. The document body, though heavily obfuscated, contains the 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.cc/pify?keyword=historia+de+la+contabilidad+financiera+pdf
    • http://files.staartyou.com/uploads/1/3/0/8/130814492/6736a5b6dd06c.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://files.myremio.com/uploads/1/3/1/4/131452958/88fb154.pdf
    • http://files.mackenzieemievents.com/uploads/1/3/0/7/130775903/lududevak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/gebatujajow.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/beginner_mind_suzuki.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/olevia_tv_remote.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/zikisajoreb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/48900966505.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/tedegevix.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/zodota.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/mulokubotizet.pdf
    • https://cdn.shopify.com/s/files/1/0440/7971/0360/files/siwanenifugopanugenop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/telumenajepimider.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/jewelry_making_tutorial.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_off0000d0b1.bin
be6dde75f59666d05cda3d08835a94479554483e907b573fec06c33e75cf992a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 5248 bytes
font_01_sfnt_off0000e28f.bin
0be1c5d4a00a0c87c85109dd0cf1481aad68a85c10d08e2e24c257e8ce68a499		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 11388 bytes

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