Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed60197c8881118b…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 04:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b538d4e057e28883157f6cd3816735cf SHA-1: 88d0a5f834edaeae94560a15481447b8455c71c1 SHA-256: ed60197c8881118b4114657532b0a2dd9025ab54bf61cf0ee7be44d947a26cd6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=kagan+cooperative+learning+seating+arrangements'. This URL is likely used to redirect the user to a malicious site. The document also contains a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://static.usrfiles.com/ugd/b8c837_e931997490774a10bc283d702ffd785a.pdf'. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=kagan+cooperative+learning+seating+arrangements
    • https://static.usrfiles.com/ugd/b8c837_e931997490774a10bc283d702ffd785a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c23f1188a5154b8980cb8176da2cb52b.pdf
    • https://static.usrfiles.com/ugd/eda9ba_c0a3f3ff00e94119902e48948be1d528.pdf
    • https://cdn.shopify.com/s/files/1/0436/5484/0485/files/23068016331.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/59842334485.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/webake.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/97454484041.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/48995100975.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/slope_intercept_form_worksheet.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_ba210e72f26c4acab2d145099953fee5.pdf
    • https://static.usrfiles.com/ugd/a31856_2997d2abe90a48bd99a2950f222da450.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_83dc045d244842adbd759966b66f508b.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_off00006147.bin
aab140cbf480dd83e2d92d37c75be5bbdc517f4c6cdc5b00439b4157a605af4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 5280 bytes
font_01_sfnt_off0000732d.bin
bc47892631a1d4afebb31b8921b792ea8ea7905ade959c61dd8b1fdb11f5742c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732D 10124 bytes

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