PDF malware analysis — malicious · 55485092b1f1054b

MALICIOUS

PDF

49.9 KB Created: 2020-08-31 16:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ace436764c43f8bd73bc0e6b11a80ab8 SHA-1: c9c6f6fd37d18e9f18473fd87bdf8a87e57291c7 SHA-256: 55485092b1f1054ba2b137966d32c472f9fcbb275ad8e25b05776cdddf9a72da

128 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.ru/wix?keyword=global+art+market+report+2018'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, one of which is 'https://static.usrfiles.com/ugd/6846fe_b69f352eb0604962b7749cd969c22fd6.pdf'. The presence of a 'download button' heuristic further suggests a deceptive workflow. No scripts were extracted from this sample.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.ru/wix?keyword=global+art+market+report+2018
- https://static.usrfiles.com/ugd/6846fe_b69f352eb0604962b7749cd969c22fd6.pdf
- https://static.usrfiles.com/ugd/834936_e4c53f37a1904904853b5b95ca89fc4b.pdf
- https://static.usrfiles.com/ugd/b8c837_40887098fa744371918c05d5ff79376e.pdf
- https://static.usrfiles.com/ugd/764aaa_631bcf35792943268d89f70c63aa0347.pdf
- https://static.usrfiles.com/ugd/b8c837_aad9bfa8932b404c8e8472955442502f.pdf
- https://static.usrfiles.com/ugd/b8c837_e2d2d1ebdadc40988c370930e0a12958.pdf
- https://static.usrfiles.com/ugd/3f80ec_490e3dac1f5442c380c9bee34de7a697.pdf
- https://cdn.shopify.com/s/files/1/0437/9086/0437/files/cholesterol_biochemistry.pdf
- https://cdn.shopify.com/s/files/1/0434/0944/0933/files/banting_orange_list_2020.pdf
- https://cdn.shopify.com/s/files/1/0440/6083/6005/files/12682649079.pdf
- https://cdn.shopify.com/s/files/1/0437/5832/1818/files/vectores_unitarios_ejercicios_resueltos.pdf
- https://static.usrfiles.com/ugd/2813e2_d0fd893403254e6a9c8be4a2e44fd591.pdf
- https://static.usrfiles.com/ugd/be19e1_20a05a7a7ba8460a9346f728b997ad83.pdf
- https://static.usrfiles.com/ugd/b8c837_432c4d5cc2ed4671be651a03bfab536d.pdf
- https://static.usrfiles.com/ugd/b8c837_d01a7cd95c214d478b765003b0f36d62.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008359.bin` `c4e51dc29999140ea0358d29d99e69ca118f512fceb61121019a5c783c723150`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8359	5540 bytes
`font_01_sfnt_off0000961a.bin` `afb93d4ae44d26e82aefeab588111dcfb5fc52453a34eb4f2a1b465e62dd3ebb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x961A	11104 bytes

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