Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8e88f3dfffd040…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 23:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c2a4c09bd475e6ef31a88395dc342d6 SHA-1: 84123eeed81e7b840fbf689a7c38e7a82e7ddc95 SHA-256: 4a8e88f3dfffd04014fb718eb18713b3cf8cf009e542132f3e0c968a54ea6cec
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous links, including the malicious one, indicates an attempt to drive traffic to potentially harmful 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=love+collage+photo+frame+app
    • https://static.usrfiles.com/ugd/c7a620_48ae38f852b04afaaae63b8dfe4859e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60a33eac6584991969a75197cdb0190.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb33a94129224f33a0713f8beccb0603.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/15774261913.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/alien_shooter_vengeance_full_pc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d850670ac11a4000abbfad43d7352e1b.pdf
    • https://static.usrfiles.com/ugd/8ab72e_091276c46a484acabf16a391b4c5c9dd.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/brazil_world_cup_font.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/70391437967.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/zifazog.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_off000070c2.bin
a8337c630b039cf287d760dd6d07ef1790f54f82dc825938d868d7e8c4af0495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 5252 bytes
font_01_sfnt_off0000828b.bin
80fcefb3d5111d289c414b21eedcbc9d42e054cda78abf56ab484064f7173403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828B 10784 bytes

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