PDF malware analysis — malicious · 40164ba60ecd0fe0

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 05:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8147faa8cb6353fa8e9efd24ff613f8 SHA-1: 51559aa77e32ea03531cc9ba4ccb1a7e5eef2139 SHA-256: 40164ba60ecd0fe0f22d5eee0b65a843bdbc0b9ef4a5f8e2f2a203e850edf407

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a large number of external links designed for SEO poisoning and redirecting to known malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=cartoon+sad+photo+hd. No scripts were extracted from this sample, but the structure and link farm indicate a likely attempt to lure users to malicious 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.ru/wix?keyword=cartoon+sad+photo+hd
- https://static.usrfiles.com/ugd/9f6a24_8db136f8514d4a49ae8a53fbd7a9109e.pdf
- https://static.usrfiles.com/ugd/b8c837_dde67105dde449979c2df446c25668da.pdf
- https://static.usrfiles.com/ugd/72216b_786bd6fc9ed84ee6a365b8ca9578d05b.pdf
- https://static.usrfiles.com/ugd/b8c837_3107dfe9b730412ba74a3e62a761ee0c.pdf
- https://static.usrfiles.com/ugd/d9d1f5_c1084f5745fd411884b99dc58a73e081.pdf
- https://static.usrfiles.com/ugd/12f4eb_ed04733b9d8040148222058d4b8ef98c.pdf
- https://static.usrfiles.com/ugd/628a76_26ed7c70e0364ebba20cc017cf88a82e.pdf
- https://cdn.shopify.com/s/files/1/0428/9078/9027/files/flight_of_the_bumblebee_flute_piano.pdf
- https://cdn.shopify.com/s/files/1/0437/9744/6818/files/8009202059.pdf
- https://cdn.shopify.com/s/files/1/0429/2699/7663/files/vabavobovawalobukeridif.pdf
- https://cdn.shopify.com/s/files/1/0430/3421/4561/files/96393120525.pdf
- https://cdn.shopify.com/s/files/1/0431/8534/0580/files/37197942847.pdf
- https://static.usrfiles.com/ugd/b8c837_1fdf14fbccdf47169eb3b1d1f1c95a63.pdf
- https://static.usrfiles.com/ugd/b5472a_ab995bf997c846488e4df6bc82a49ec9.pdf
- https://static.usrfiles.com/ugd/63d3ad_ef1cfcbdd84d4c73bb213b0ba18dfe16.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_off000049d0.bin` `491489cae450b480525dc78da72b9293bce256c7349f8da7a96b1336baa1b510`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x49D0	4920 bytes
`font_01_sfnt_off00005a7d.bin` `69ad3d1a2fd2e03b312e66bb8183d325377c4eba75736465e4d970f3a432a1d7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A7D	10096 bytes
`font_02_sfnt_off00007d0a.bin` `3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D0A	16164 bytes

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