PDF malware analysis — malicious · 8ca35295d5e179f9

MALICIOUS

PDF

43.7 KB Created: 2020-09-06 19:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 974ac6b774a06a97b9f3279858f3e44b SHA-1: 78868f21cd1ef7f65a602a34b13d216e26e1cda1 SHA-256: 8ca35295d5e179f9e38b1cb7ac914db1d1e0495047de0ba86d5736c0bcd0efdf

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=bangladesh+govt+holiday+2019+pdf'. Additionally, it exhibits a PDF link farm pattern, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but also includes the malicious URL and several benign-looking PDF links, suggesting a lure to trick users into clicking the malicious redirector.

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.club/wix?keyword=bangladesh+govt+holiday+2019+pdf
- https://cdn.shopify.com/s/files/1/0438/0894/8386/files/tujuan_bioremediasi.pdf
- https://cdn.shopify.com/s/files/1/0435/3366/4420/files/tukiwaxilomexutif.pdf
- https://cdn.shopify.com/s/files/1/0445/9390/5828/files/writing_academic_english_ann_hogue.pdf
- https://cdn.shopify.com/s/files/1/0432/3042/9346/files/lotaxivas.pdf
- https://cdn.shopify.com/s/files/1/0435/3975/9259/files/balomifitu.pdf
- https://static.usrfiles.com/ugd/04e6f9_8ebfe675e6da4d67862b383522146931.pdf
- https://static.usrfiles.com/ugd/3d0627_040bb3768339498ebe24032b665bf66b.pdf
- https://static.usrfiles.com/ugd/b8c837_0cbf90df8ae845fba507f72abba8354c.pdf
- https://static.usrfiles.com/ugd/b8c837_d34944ebd7a840a1aca28e821e20bf63.pdf
- https://static.usrfiles.com/ugd/30ea26_108b304f707d4e069477ca947423387d.pdf
- https://static.usrfiles.com/ugd/9b33c5_8143c596e1b942f7bbde5a4cce475d89.pdf
- https://static.usrfiles.com/ugd/314c35_950037c464da47eaa9afb71fc4788096.pdf
- https://static.usrfiles.com/ugd/dc8a8e_ee7c32c5d386410dac5c4f0e81bf526d.pdf
- https://static.usrfiles.com/ugd/72b0e7_dd52152eb0cb41d1823a60abc683e966.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e03.bin` `b6e80166fcc9292bf37367ad82d321b7661c07284dcd96772b5791f225a386da`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E03	5688 bytes
`font_01_sfnt_off0000716b.bin` `d069192cb9dde62d7167186781954b7dc8ce622bda4deda3a376316f48c5daa1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x716B	10532 bytes
`font_02_sfnt_off00009432.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9432	4324 bytes

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