Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a72324292818134…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 01:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6597bb0ce65c6cfd39e18c1a67d6bc69 SHA-1: ace898eee573b41872fac8e6e703de842bd25232 SHA-256: 4a723242928181342cf90bb919c35f153aa2f87a89f3407c5bdaa68a3e56c9e4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure for a legal document download. The primary malicious URL is ttraff.cc, which redirects to a page offering a PDF download. The presence of a large number of Shopify links suggests a link farm technique to improve SEO for 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.cc/wix?keyword=c%25C3%25B3digo+civil+comentado+2018+pdf+download
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/4206834423.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/d_d_5e_player_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/tewozaborisareguregulemim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/34023707797.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/6920067011.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1173/files/34450835841.pdf
    • https://cdn.shopify.com/s/files/1/0432/5002/4603/files/international_osteoporosis_foundation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0446/3912/5667/files/online_to_autocad_drawing_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0879/2475/files/4294427582.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3088/files/alkane_nomenclature_practice.pdf
    • https://static.usrfiles.com/ugd/7f16bd_60c4f54d59be46dc932405eeed49492b.pdf
    • https://static.usrfiles.com/ugd/576447_358be4a87822493dbdd21b032bad9ef0.pdf
    • https://static.usrfiles.com/ugd/a91264_6fcefa624fd04e7789bbe921fe72f768.pdf
    • https://static.usrfiles.com/ugd/b80405_b18db9bd18094b74b604132da287c064.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cd13bc5671c41d9bfb1df8e0549c6cc.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_off00005704.bin
9af8327902915b0691cc5fc6751d4c7de554486299a4ab5405cc6d0f36201da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5704 5916 bytes
font_01_sfnt_off00006af7.bin
c60d2b86e4aa82c9b6417d9ef0bbec0b2ff2c6e4f12ce7cee5f6791820c9902f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 14612 bytes

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