Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1bbb6376ba86a7…

MALICIOUS

PDF

50.7 KB Created: 2020-08-30 20:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 589957851cbfc23cf048900c5f8d4e10 SHA-1: 4ce9d9765233e06ee555df817a0227e344cd4c0a SHA-256: de1bbb6376ba86a770a00801b479c78f3a73d2035c6ed83669e7379d7d2134c4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, likely to disguise malicious intent. The primary malicious URL identified is https://ttraff.com/wix?keyword=choices+and+connections+2nd+edition, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and references to other PDF files hosted on Shopify.

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/wix?keyword=choices+and+connections+2nd+edition
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/29923984205.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/72354543153.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/72143367182.pdf
    • https://cdn.shopify.com/s/files/1/0460/7085/7892/files/aerospace_certificate_of_conformance_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/carpenter_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9949/files/wasipobukigazoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/lebijazujewipesidolojaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/20083314380.pdf
    • https://static.usrfiles.com/ugd/33a16d_bbfa04d2b645406e8c24f4d88f6d99a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7ea4b6579c442b2aeb73c51e33c3a11.pdf
    • https://static.usrfiles.com/ugd/576447_34eff7ca2b7d45368586c39db3d64567.pdf
    • https://static.usrfiles.com/ugd/4bb894_92881346032d49aa8ee404f3b8bc8855.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/mumaful.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/65911632752.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/radoditopexukofale.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_off00008a04.bin
0b5c1f296c9f4c51f4c88ad8ce71a435929f585a7de48f6f4a94832204fd693f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A04 4936 bytes
font_01_sfnt_off00009aba.bin
b17d3c9353562bef3b3d20bdc306f52542748fa1a32a8e490b29ea635f206dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 10296 bytes

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