Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e2e8831ce1d982…

MALICIOUS

PDF

53.3 KB Created: 2020-08-31 05:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8897ff532221b0658c98d880667e7c2b SHA-1: 434dba8a17bc67d022e0d8843c9dea39919acfd4 SHA-256: b6e2e8831ce1d982e8ba3a7b375c38e0e27a97ce1712ba9a56b182e1c0ce0533
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.com/wix?keyword=fresh+start+21+cleanse+pdf'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://static.usrfiles.com/ugd/b65acf_17c1298989c84f0aa97f368482ac7c7a.pdf'. The document body, though heavily obfuscated, contains text fragments suggesting a 'cleanse pdf' theme, likely a lure to disguise the malicious redirection.

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=fresh+start+21+cleanse+pdf
    • https://static.usrfiles.com/ugd/b65acf_17c1298989c84f0aa97f368482ac7c7a.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_face27ef951b4020b6c49a1948f5ed70.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b99b6464864c338379f84ed86d63f1.pdf
    • https://static.usrfiles.com/ugd/c068f8_58401d48ffda4863a35630b68ec2f23b.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_0b293bfcd085408c8f25c60b49289bc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_def89ea1257645e09c74abcd83d51160.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7543a49c0ef427ab294ad4b80b9a20b.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/13953662414.pdf
    • https://cdn.shopify.com/s/files/1/0437/4786/8826/files/lost_maples_state_park_foliage_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/peviweb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1146/files/zojuvuwikezegefamonovoduv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4320/9895/files/80149408303.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/83184207640.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000853c.bin
2bb619a32fa1bdc2c59b3204545befecd019da0d1ad2a113d7183829afce433d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853C 5012 bytes
font_01_sfnt_off0000963e.bin
7e9fd95b6566827f891687e70a30f401dada1ecd6a19c5acfcc5f85d231d2af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963E 10540 bytes
font_02_sfnt_off0000ba50.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA50 4324 bytes

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