Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c45e172d501c583…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 03:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e59c8d48cb0fed028094fe0b04bf99 SHA-1: 6f4c36334c045d30d3c5a858fb0230f361abd4b7 SHA-256: 9c45e172d501c583f68efb2deb5b8f324de0b92706422facbd4efd81c90fd223
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=alphabet+writing+worksheet+for+kindergarten'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0431/9998/7873/files/mojakugusagokepif.pdf'. The document body, though partially corrupted, includes the target URL and appears to be a lure for a worksheet, suggesting a social engineering attack.

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.ru/wix?keyword=alphabet+writing+worksheet+for+kindergarten
    • https://cdn.shopify.com/s/files/1/0431/9998/7873/files/mojakugusagokepif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9369/files/bunco_score_sheets_to_print.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8816/files/dazekadinatozuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/10782593169.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45ee15d0da44aeeae51d85a94ec3e0b.pdf
    • https://static.usrfiles.com/ugd/43d598_cfc752b6a02248839fca751f15dd3264.pdf
    • https://static.usrfiles.com/ugd/b47706_7ee3402d98484b61bb5a2853ef112beb.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b0f315ce69400b92392478d17f8673.pdf
    • https://static.usrfiles.com/ugd/ea2f88_94c97233c91646198938382917f5852d.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/movuzovikugiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/42157645135.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/botojemuxijader.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/24998574220.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_off00005cf2.bin
64d7fca895e74fb881041fecca3a6578e80caddc5e0464e7101a100682ec3e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 5588 bytes
font_01_sfnt_off00006ff0.bin
3997fed06c27f449157a19f8fa259253f8057bcbb8460c09ec7e936ad58fee6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 10348 bytes

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