Malicious PDF — malware analysis report

Static analysis result for SHA-256 e157e2ee0ecee429…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 11:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44c5466e36ed237910c22269d4e304e7 SHA-1: 9ce06c5b85cc7594f58b1d1ff838c37056a49450 SHA-256: e157e2ee0ecee429e25286ea32a14c80c8b35240396e10d01ab0eadda406e509
120 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.ru/wix?keyword=cameron+diaz+Schuhgr%25C3%25B6%25C3%259Fe'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0429/1405/4300/files/raruxotikotunuwaleseponi.pdf'. The document body, though heavily corrupted, contains fragments of the redirector URL and the Shopify URL, suggesting these were intended to be visible to the user. The overall pattern indicates a lure 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.ru/wix?keyword=cameron+diaz+Schuhgr%25C3%25B6%25C3%259Fe
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/raruxotikotunuwaleseponi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/1st_edition_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0461/2148/4452/files/43869727006.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9021/files/59146685346.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3533/files/60329850382.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/character_types_worksheet_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/38420998754.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/hbr_office_politics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/tapaletes.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f1e1e5ff5b47909987506a0e287bf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4904fb0ba084e1d9d91f1739727aeed.pdf
    • https://static.usrfiles.com/ugd/590778_34ca463839cd4875a120c7a3f64e5c3a.pdf
    • https://static.usrfiles.com/ugd/1c90dc_27a79ab5f66940749a5c29cb9e2f5c1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafbd17cb98245e3a07b59be7b774e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_3544602e03e64af2b92d58f3b9961831.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7a857dc0c504b479524203800e8996a.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_off0000657e.bin
5e4c5e2e1d10401f211d85c2142e00fe81f3a5b99451b15db99d8d001e7b803b
pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5640 bytes
font_01_sfnt_off00007848.bin
9f5ce64e182ac5469a76d3e59bee41eba1fb6e9a13caa3250c0eccb9d17914a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 11248 bytes