PDF malware analysis — malicious · d008783b72459db6

MALICIOUS

PDF

43.6 KB Created: 2020-09-08 10:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 99548b07c13ba7ea0f615d771a783cac SHA-1: afc00764199b4d0b62bf2c2066ca71ed2a157515 SHA-256: d008783b72459db6204d6f7f7c6c5f5d23e7a2234f86897d6ed13567eb6353ab

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as an autoresponder template. This indicates a phishing attempt to lure users to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on static.usrfiles.com, likely part of a link farm to improve SEO for the malicious redirector. No scripts were extracted, but the presence of the malicious link and the heuristic firings strongly suggest a phishing attack.

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=autoresponder+template+out+of+office
- https://static.usrfiles.com/ugd/e3834b_f54f50278c1e404ea4107dd0e8be9ef0.pdf
- https://static.usrfiles.com/ugd/f6336d_3f39ddb766c241ff8661bbbec2747c69.pdf
- https://static.usrfiles.com/ugd/966478_259b8178d9c84aeda9e6d8f894ea5aa6.pdf
- https://static.usrfiles.com/ugd/41a0b6_9153cbc29703423fbe3112c45dd09f16.pdf
- https://static.usrfiles.com/ugd/b8c837_5f0e8922dfd942efa2013882555d4d27.pdf
- https://static.usrfiles.com/ugd/d3758e_e857dd2916154246bdb1957b79e1ac62.pdf
- https://cdn.shopify.com/s/files/1/0431/9569/5266/files/bajalenow.pdf
- https://cdn.shopify.com/s/files/1/0431/0895/8362/files/69829184294.pdf
- https://cdn.shopify.com/s/files/1/0429/7215/1959/files/attitude_motivation_test_battery.pdf
- https://static.usrfiles.com/ugd/405339_b27b0a6dd616491c9d5aa07faf46a28c.pdf
- https://static.usrfiles.com/ugd/9e53d4_48f6f57bdad64c2688892b73acfa9d75.pdf
- https://static.usrfiles.com/ugd/a51aec_e10ca9060772485fa55eed1dcfa95a2e.pdf
- https://static.usrfiles.com/ugd/bca722_78a6e7d56e7d41a580fb82eac0a73047.pdf
- https://static.usrfiles.com/ugd/b8bbd7_6efe2660c83048e6b436ed467baaa40b.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_off00006b69.bin` `19a28fd77b207b6741c92a2fcb0220d35477cd1b67628066068ca593f87e853f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B69	5288 bytes
`font_01_sfnt_off00007d4f.bin` `c0401aeda1d89722cfc2df1a40c2df04aab628bc63d8e5d0d2ff93abb38ab8c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D4F	10672 bytes

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