Malicious PDF — malware analysis report

Static analysis result for SHA-256 35924fb2ba6488ce…

MALICIOUS

PDF

47.0 KB Created: 2020-09-02 00:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4725d5b70656b2d5357c59dee70d3260 SHA-1: 8c0ebf139bdbc376d2eefef9790a8f865e4d689f SHA-256: 35924fb2ba6488ce0b6bc56bb13a8eee45a887e7e30479069c9abfce3fad69d4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Arcgis desktop 10.1 free' and the URL 'https://ttraff.com/wix?keyword=arcgis+desktop+10.+1+free', suggesting a lure for software downloads. The presence of numerous Shopify-hosted PDF links indicates a potential SEO link farm used for distributing malicious content.

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.com/wix?keyword=arcgis+desktop+10.+1+free
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/cymera_apk_old_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/30895048159.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/bodyweight_strength_program.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdf
    • https://cdn.shopify.com/s/files/1/0459/8090/9735/files/56909315753.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/89045096117.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/pepazilamibaxaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/charlie_morton_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/ginejujipogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8767/5036/files/85916919240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/99500020991.pdf
    • https://static.usrfiles.com/ugd/b8c837_42c352870c6d464aa2ba5c4fa26692ff.pdf
    • https://static.usrfiles.com/ugd/b91566_0ac641aff79742a3846b5c44e9204062.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_off00006c8b.bin
fcf942dccf17a0f7a6e8a007e6cb184d88b143d12e555d0bc43e1f992d0160e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 5360 bytes
font_01_sfnt_off00007ef1.bin
54f19f6ec5ccea17b6a249134072ea8280ebc260155a7a1af4a10c56ca3473d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 14696 bytes

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