PDF malware analysis — malicious · 3c162c65ff828e15

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 05:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a3ffb37ce7c2d2b9212630ae7632d3cd SHA-1: 21cd0cbfddb55517ff9743fbf4cd4789939608ba SHA-256: 3c162c65ff828e154fdeeba73f038acb0ba4b33369997d4dd11d393df2c62eff

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a link farm for sheet music. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to 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.com/wix?keyword=ashes+of+love+ost+piano+sheet+music
- https://cdn.shopify.com/s/files/1/0434/8251/3561/files/sodium_bromide_msds.pdf
- https://cdn.shopify.com/s/files/1/0427/5165/6102/files/95769473475.pdf
- https://cdn.shopify.com/s/files/1/0433/2018/0894/files/zolugowisobezodususowixid.pdf
- https://cdn.shopify.com/s/files/1/0429/5639/0551/files/molugevelad.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/logopazunu.pdf
- https://static.usrfiles.com/ugd/0a593f_c342a227cc5f46fead66f19bcf6247ec.pdf
- https://static.usrfiles.com/ugd/9904c2_ab698cd339f44360978fe92daa2d0f61.pdf
- https://static.usrfiles.com/ugd/b8c837_d78f471f79da4167b0a7e9953e87252a.pdf
- https://static.usrfiles.com/ugd/4725f1_66cb116c5c7541f4b187d4c897121cbe.pdf
- https://static.usrfiles.com/ugd/cac9e4_c2c6f3465a424f6391b5b1719b5ac938.pdf
- https://static.usrfiles.com/ugd/1d64af_a0dc7548380446cab191b048122a41e2.pdf
- https://static.usrfiles.com/ugd/b8c837_fc25a47a265146d5aba92136afab4e3e.pdf
- https://static.usrfiles.com/ugd/921909_2db10fab1e964a7da0d16b558cd32690.pdf
- https://cdn.shopify.com/s/files/1/0435/8235/7663/files/vicente_fernandez_corridos_de_caballos.pdf
- https://cdn.shopify.com/s/files/1/0434/8936/2082/files/26836628394.pdf
- https://cdn.shopify.com/s/files/1/0431/4402/0125/files/john_deere_weed_eater.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_off0000549e.bin` `a977dd6b95d3bf1082fd4f5a98c54ff1584c56af5b4907a5499e7935f18fff94`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x549E	5208 bytes
`font_01_sfnt_off00006634.bin` `8e2c76085cad1df3609ab0c93a52b6c1498ba3638783b6b641dd13de03aadff5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6634	14644 bytes

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