Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca88525f4c3ffa8e…

MALICIOUS

PDF

53.8 KB Created: 2020-09-03 01:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23f4d371df8f7b2f009b1301b5feb2f SHA-1: 6b3019d9d8ce6dc1eda30f3559cab3651c5e8309 SHA-256: ca88525f4c3ffa8e8a465174f5a65161ec4636f43c3ecea3c78499fcd8ad2211
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though garbled, suggests a lure related to 'free christmas gift certificate template pages', aligning with phishing or scam tactics. The presence of a link farm further indicates malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=free+christmas+gift+certificate+template+pages
    • https://static.usrfiles.com/ugd/b8c837_1a6e49bd056343b98de48587020d11e8.pdf
    • https://static.usrfiles.com/ugd/c0b427_7fdd573eb2b141bb9a5108b0e05b25a9.pdf
    • https://static.usrfiles.com/ugd/0511f5_0151008ded5d44ba95a1e4527dd9c74e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0183fa233b04eaba1a5c57c03c6be3f.pdf
    • https://static.usrfiles.com/ugd/665c20_d57127a19ff44a9a9f2bb8a33c6c9590.pdf
    • https://static.usrfiles.com/ugd/b8c837_674781065962444f941d623837850560.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e43aeba9e79492dbf2cae5d68a824a9.pdf
    • https://static.usrfiles.com/ugd/9b2d9b_6b9bc847b4b249e8b73387c3a4985506.pdf
    • https://static.usrfiles.com/ugd/4b68be_7b280d4320b248daba8b814325ec50a2.pdf
    • https://static.usrfiles.com/ugd/a91264_f9c7844d49424142b002754a09a0adba.pdf
    • https://static.usrfiles.com/ugd/7a359d_9be873bcce3b47d4bb19e188edfa970d.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1062/files/cara_video_facebook_pc.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/65569397775.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_off000091d2.bin
96b7964aa72dd28768b595f8d9ae5982e6f2216b63dceea06543ffb0cebc277e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D2 5384 bytes
font_01_sfnt_off0000a3ff.bin
feb12386ec8e8445de05766435ba4bbf989a4c2865ddea9bc2f6658927da1d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FF 11244 bytes

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