Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a51be7fc93d23b…

MALICIOUS

PDF

38.3 KB Created: 2020-09-02 09:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e564176f5074bb34e16ef407a9f0535 SHA-1: 1cb5e8f764ea770ebe663f3788ae5c18c5ec79cc SHA-256: b2a51be7fc93d23bc017ad93bf4e96d4cb4cd0ecbb42a5cbf3f51cdfed90b430
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 a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector. While the document body is heavily obfuscated, the presence of numerous external links, including one to a malicious redirector, suggests an attempt to lure users to malicious sites or manipulate search engine results.

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=magazine+template+html5+free
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/fukeniwezeputon.pdf
    • https://cdn.shopify.com/s/files/1/0439/8707/5230/files/25550235779.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/jofemaxu.pdf
    • https://static.usrfiles.com/ugd/625844_1dbff4ec180649329ceb412417f76000.pdf
    • https://static.usrfiles.com/ugd/115d6e_7e00016938074ba5a65ae4de3379786c.pdf
    • https://static.usrfiles.com/ugd/aa14a9_81a243f7ed57458fb9efa83501a1bde6.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/gabasuxarupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/39669604234.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/aetna_medicare_expedited_appeal_form.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/uk_8_ball_pool_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/angular_2_viewchild_ng-_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/wedogomodekaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/zadabejejijazune.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/cannibalism_in_poultry.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_off000058e1.bin
685e96f08e9735806a7367f36121311d7ac453f922e9a93d9184c35bc3a51167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E1 5316 bytes
font_01_sfnt_off00006ae8.bin
6499c4d44435e419ac0ed27a7945c63710fcab6b7409d095ec13946be80a1cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 9856 bytes

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