Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb082440cd803922…

MALICIOUS

PDF

33.8 KB Created: 2020-08-30 07:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7769a492c3ea0f28573e94f29d77f42a SHA-1: f285b85bd198835aeeee111fe457c7a46d2b54ad SHA-256: bb082440cd803922426e4e378f8c0d358c56f4b1d794d3acdb565ee3a5b0fe92
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a reference to the malicious URL. This suggests a phishing or redirection attempt to a malicious site.

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.cc/wix?keyword=readings+2+eso+pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/pdf_file_merger_offline_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/web_templates_photoshop_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/27591649622.pdf
    • https://static.usrfiles.com/ugd/3aca14_221718f83cb9456fa2ba7f8332c25acf.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_c24cfe52dfaa4302b0f2901257f8c725.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e475a1fbbc348a99f365c7fb168bdc7.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_565056c129804b74815699e406032faa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/99187606805.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/varazixunopanavofofivawa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1544/files/gopoxoviketigonijetu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/junior_scholastic_answer_key_january_28_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/ajax_jquery_file.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_off000045c1.bin
47da66f0d21823c1fed8ddadbaf3032f36d7995a1a228e5320a6a68642fa5e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45C1 5220 bytes
font_01_sfnt_off000057a2.bin
d9e72cfdffba72b40a44ba4ebbcb382b26856a3abecd554482b2764a76958a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A2 10432 bytes

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