Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8aa839e6b45e47…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 03:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6117c593d0efaa95e67f78b5e0b584ff SHA-1: f3ba21ea2fab64b3785f4477ead1a66ca48a9479 SHA-256: fb8aa839e6b45e471c9d8e26f8a082d18b3d7f1e0f188648be1c1f674ed1ecb4
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm. The primary malicious link, https://ttraff.me/wix?keyword=simple+buoyancy+problems, is flagged as a redirector to malicious infrastructure. While many other links point to benign Shopify domains, the presence of the redirector and the sheer volume of links suggest a malicious intent, likely for SEO spam or to lure users to malicious sites.

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.me/wix?keyword=simple+buoyancy+problems
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/bexomijoxagaxoxowinovekov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/ligivufizomonixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/jazowitujodedeneregor.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/astigmatismo_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/turbo_c_16_bit_compiler_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/32039456175.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7438/files/91025363998.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/86479436137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/31301604846.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/honda_crv_2008_manual.pdf
    • https://static.usrfiles.com/ugd/0dd040_8555ebd5d2cd40758c759d214073abf0.pdf
    • https://static.usrfiles.com/ugd/e8506d_06a9a6f2dcf042309ab52014bc8189d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bf5f0542ac040e7a0fded49a6d5ec24.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_off00006674.bin
9eb2c7b0b56c71f36a9439e1fa54083b22399dda7ba4234b6a143b598cbd5875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5424 bytes
font_01_sfnt_off000078c4.bin
b4f1d089f98bd0031f2e666310294890ec1a8e0923faa7e3c40161d3c1ea95c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 10536 bytes

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