Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d53de1bab1c6a1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 04:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 931c42cae2d8882da72894ba7871fbb8 SHA-1: 80c11a68e890a8cca4ae370f1390bf0b790812a2 SHA-256: a4d53de1bab1c6a19603067e6323824d594917c92e123e2a8385162a53f834e7
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=tupperware+mini+rice+cooker+instruct'. This URL is presented within the document body, disguised as a product instruction. The file also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign Shopify domains. The primary malicious link is the most significant IOC, suggesting a phishing or malware delivery attempt.

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/wix?keyword=tupperware+mini+rice+cooker+instruct
    • https://static.usrfiles.com/ugd/b8c837_d92458ecee1c45c6b35af5bffbd129bb.pdf
    • https://static.usrfiles.com/ugd/33c377_cfc9c7f8f2774a3f897f5cebfa0823b4.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_df934dcb00f94ccf9c35c96653e8c771.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/sara_ataxia_outcome_measure.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/filipino_tattoos_ancient_to_modern.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6513/files/unity_project_gitignore.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/gigeveluxalupudexipuvebup.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/vefavidasep.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/59282274633.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/2114236815.pdf
    • https://static.usrfiles.com/ugd/b8c837_940384b7959d48c39fa2658203273150.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb6a9758c2f04997957071f5dc67302f.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_off00006a1d.bin
4cfaa0dec8585d192fd4bac42a9ac546d5dd3eeed30071c2cd498d497399fdfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1D 5152 bytes
font_01_sfnt_off00007b9e.bin
7c57ef0c50324c33a4ff3c2a3683b248ec54b0c9ca87bea418eca743ded016a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9E 10428 bytes

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