Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba313b91498ef19d…

MALICIOUS

PDF

34.8 KB Created: 2020-08-01 05:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb2361b661c25d5f2aff8efd56df79bf SHA-1: 3a2384f0e99103ba8d60d1b97d9b3cda0f39bbe6 SHA-256: ba313b91498ef19ddfcc79f6a8e063b2b88711141e5f8c3c48d7fc8a426f01eb
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or phishing lure. The document body contains obfuscated text that includes the malicious redirector URL and references to 'vbscript browse for file', indicating a potential attempt to trick the user into downloading or executing further content. The presence of a password-protected archive lure suggests the actual payload is hidden and likely malicious.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=vbscript+browse+for+file
    • http://files.wilsonlee168.com/uploads/1/3/2/6/132681145/xepeguveluluzi.pdf
    • http://files.shaareitorahcincinnati.org/uploads/1/3/1/4/131453902/pubomojek.pdf
    • http://files.fortwalkin.com/uploads/1/3/0/7/130775229/8629169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0437/4134/7994/files/wezanoroxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/44508025440.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/3092924537.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/65259015104.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/78879299787.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/97444154336.pdf
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/35510393582.pdf
    • https://cdn.shopify.com/s/files/1/0428/1031/0822/files/53372386846.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/6742224485.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_off00004c40.bin
ae7e2da7c4e9cfd9e5884697032447a36ee4ce892f778be7de23575800f3617a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C40 4996 bytes
font_01_sfnt_off00005d68.bin
f33de7ed82e50328b99ec7b24e6784cc0991914f674eaefae8a7332d79618dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D68 9732 bytes

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