Malicious PDF — malware analysis report

Static analysis result for SHA-256 5235ecd35a8aa2d5…

MALICIOUS

PDF

64.4 KB Created: 2020-08-18 21:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b264836eac0ddefb8fbea7964c702f4 SHA-1: 2325944adda6d526248353a19932ce152ffcdbf4 SHA-256: 5235ecd35a8aa2d5162ba65c579495f1a5aa7809af6e50795e6af6f2579e00f4
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'CBT worksheets' and a URL that aligns with the malicious redirector heuristic. This suggests the document is designed to trick users into visiting a malicious site by posing as a legitimate resource.

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=cbt+worksheets+for+substance+abuse+pdf
    • http://narerari.gregterry.org/uploads/1/3/0/9/130969173/jusiratiledur-welesefudog-nukaworifepawuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/learning_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/microwave_cake_recipes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/facebook_sdk_android_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/19202166169.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7110/files/wafebawinolukame.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/98480487933.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/curriculum_vitae_formato_europeo_compilabile.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/juegos_wad_wii_ntsc_mf.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/kodeborutiwazirok.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/identity_malta_position_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/55373402272.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/wusovelabixokuvode.pdf
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/social_media_marketing_advertising.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_off0000bf63.bin
410182c98719cf8d3f7b4fd656c5f89bfaff13ce3eaba00b1084241371270b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF63 5412 bytes
font_01_sfnt_off0000d1cd.bin
4aa86d34c5c62fd2e10d5b628d7656dd438a9ff301c8db3f0c16709446d1366f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CD 10304 bytes

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