Malicious PDF — malware analysis report

Static analysis result for SHA-256 b701ae69055046de…

MALICIOUS

PDF

113.2 KB Created: 2020-08-31 09:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879fe37661a3617f41ff4c916194685e SHA-1: ffb3116cd6de0bf0e10f99c28568d5371a42a6e1 SHA-256: b701ae69055046dee1bb0800330e4042821be54f815a9208ebbccac9bb59bf63
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass external PDF link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'special k download' and the malicious URL, suggesting a lure for users to click the link. The PDF is likely designed to redirect users to a malicious site for further exploitation or credential harvesting.

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=special+k+download
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/bavebaparuvofawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9694/0448/files/zexiloxulusanenuxopibagiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/invertebrates_worksheet_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/xarew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/bovagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/molawikiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/bernoulli_ordinary_differential_equation.pdf
    • https://cdn.shopify.com/s/files/1/0452/8193/5522/files/mazijigapotulujawibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/panurakeripuruvamujobamiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/gufixawerot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/54653995032.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/favofamiluwodedudi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d2e.bin
bc4951a96fdbd8b5dab1d596d88d3c003fe4f9a6d21037256603008687720f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2E 3436 bytes
font_01_sfnt_off0001797a.bin
b5e2cec721ff47d3c2b060b95dc6d03475395798c7748b32752cd97baa16ea00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1797A 5052 bytes
font_02_sfnt_off00018acb.bin
03cfdbbf4eb7ba8b4c11ee374db2de1fc2e22e2bb24841b5776be5401a248c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18ACB 14096 bytes

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