Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b48fdb0cd274796…

MALICIOUS

PDF

56.3 KB Created: 2020-08-12 15:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 773b3ba8fe2d5b22cb56f36ad744f223 SHA-1: cf73d4c6a3aa15dcde3aaebdf7d13e528c0f7112 SHA-256: 4b48fdb0cd274796629e85c628e239814924efa994d9a0dfc5733e8cf7212e12
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=wedding%20decoration%20magazine%20pdf', suggesting a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector 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.com/wb?keyword=wedding%20decoration%20magazine%20pdf
    • http://files.fencerowfinds.com/uploads/1/3/2/6/132681749/08a69e.pdf
    • http://files.acneskincareclinic.net/uploads/1/3/1/4/131453821/vipakunadajukusavu.pdf
    • http://bunum.lisaholisticbathandbody.com/uploads/1/3/2/8/132816066/7972852.pdf
    • http://files.wearecommunityfirst.org/uploads/1/3/0/7/130739718/2322287.pdf
    • http://files.shadesofdenimaus.com/uploads/1/3/1/6/131636655/7a04b90ef2f.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/zivosikud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3443/files/gilokixisodunup.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/88983165772.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/contoh_makalah_agama_islam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/kisovesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/46984135582.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/wemuledadanam.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/lexuzodin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/fesufag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/19273011516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.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_off00009ee9.bin
79585937c04050e2bcabf31a2879b4b73b50fe3ef9321c3191fe96e48e3333ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE9 5328 bytes
font_01_sfnt_off0000b0fe.bin
adc7dc588f2d859d9db2a3f47f6bf817a112b84f9d4f403382101cddf1ba81e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FE 10320 bytes

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