Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5387b43d2ca3a54…

MALICIOUS

PDF

52.1 KB Created: 2020-08-15 10:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ddf63d2a677edbd0a0c6c62f40e777d SHA-1: 55c1f0c7b6458e72072d850181bd0d48e422b27e SHA-256: c5387b43d2ca3a542d97f0135136532471694c0d86edab695d704fdf80f8c806
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the same URL found in the heuristic. This suggests the primary purpose of the document is to redirect the user to a malicious site, likely for phishing or scamming purposes. The presence of numerous other Shopify links, while benign, are part of a link farm strategy.

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/pify?keyword=brushed+cotton+fitted+sheets+super+king+size
    • http://files.independenceffa.com/uploads/1/3/1/1/131163718/favokajaw.pdf
    • http://files.firefighterrescuesurvey.com/uploads/1/3/0/8/130814644/acb387e833b8.pdf
    • http://tewuz.thevillageartscenter.com/uploads/1/3/1/4/131438563/ec6f0e43378434.pdf
    • https://cdn.shopify.com/s/files/1/0439/0204/2280/files/automatismos_electricos_industriales.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/freecodecamp_tribute_page.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9259/files/100_books_everyone_should_read_before_they_die.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/letebavipeko.pdf
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/koveza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/84470892280.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/mifudiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/arabesques_gogol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/49066593087.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/62011391083.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_off00007efc.bin
12ac75052c56bbaedd05e8dd453b31337f8f8ef8201f82156ceea0c40714f2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 5340 bytes
font_01_sfnt_off0000912c.bin
5c751cd6d233067ddafc5a689fb64fc29784bb593ab34cdbaad245ca2bc4a091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912C 16420 bytes

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