Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e255b824250946…

MALICIOUS

PDF

61.1 KB Created: 2020-08-22 07:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9ce3b243dafb634e235bd4b46167092 SHA-1: 6256cc778504bb0642a85273b8e1fe7e5cfa2aaa SHA-256: c6e255b8242509462d70abbb2ec5288eaca5a99cd9b2d41c27648b576a0e698f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=acuerdos+de+paz+el+salvador+pdf'. Additionally, it features a PDF link farm heuristic, with the first URL being 'https://cdn.shopify.com/s/files/1/0435/2973/2248/files/gulzaar_chhaniwala_ijjat_song_video.pdf'. The document body, though heavily obfuscated, contains the same redirector URL. This suggests a phishing or social engineering attack aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=acuerdos+de+paz+el+salvador+pdf
    • http://tomikanu.jogen.org/uploads/1/3/0/7/130739860/3f630c43403.pdf
    • http://files.cvdm.info/uploads/1/3/1/4/131452778/konoka.pdf
    • http://kugivivog.ritecookware.com/uploads/1/3/1/4/131453960/f43badd.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/gulzaar_chhaniwala_ijjat_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/83043595753.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/veni_creator_spiritus_ocp.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/85936394544.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/working_environment_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/21508049293.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/nolilasekenegirabilikox.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/pujowinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/linkedin_company_profile_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/definition_of_creative_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/85332214981.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/zolagofepebup.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_off0000b0f3.bin
0ed0e94a503c58577c84f641a917caca2609fc7882f2c6f5aca41fda82d03c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F3 5248 bytes
font_01_sfnt_off0000c2ec.bin
7df84b3eb5a33ca9c07f21ef8181b91c924a3a19824ce015d7dcb8fb24e22ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EC 11052 bytes

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