PDF malware analysis — malicious · 37f8a9e6340c8124

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 13:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4f891923f08767b733250a6ad6f03339 SHA-1: fff0cc4ef1312b54bb82645745493bfd9a907e7f SHA-256: 37f8a9e6340c8124605dcd917e09774fae7c6bf0fc0c79269b6b760d9fd65c8a

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to AutoCAD and the malicious URL. The presence of numerous embedded links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to distribute the malicious content. The primary attack vector appears to be social engineering, luring users to click the malicious link under the guise of a technical document.

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=autocad+convert+3d+polyline+to+2d+with+elevation
- https://static.usrfiles.com/ugd/43d598_7fe7fa26f6954bab861806e128441521.pdf
- https://static.usrfiles.com/ugd/90c678_a4a38f58cfd34ed3b211cc0610e23d11.pdf
- https://static.usrfiles.com/ugd/0c4177_9b16257b7d794c0cbc2845bfabe4da3a.pdf
- https://static.usrfiles.com/ugd/affb4a_d0024f10cef04f728dc7b09c334f160a.pdf
- https://cdn.shopify.com/s/files/1/0433/5036/0232/files/79600550749.pdf
- https://cdn.shopify.com/s/files/1/0436/6857/0265/files/non_integrated_cost_accounting_system.pdf
- https://cdn.shopify.com/s/files/1/0429/8565/2375/files/42315695612.pdf
- https://cdn.shopify.com/s/files/1/0433/5586/5243/files/bhagavad_gita_in_malayalam_with_meaning.pdf
- https://cdn.shopify.com/s/files/1/0432/7741/8656/files/tuzefu.pdf
- https://static.usrfiles.com/ugd/b8c837_39a3f44cf804498ea10c6a147c3aed1e.pdf
- https://static.usrfiles.com/ugd/8de238_dc037b4f94304ff787a0c4123d07c3c1.pdf
- https://static.usrfiles.com/ugd/33c377_b2683ec48bf04abeb6ed5e35c6426595.pdf
- https://static.usrfiles.com/ugd/3eed2b_58c557992f4a42d6aed9d02b9192c730.pdf
- https://cdn.shopify.com/s/files/1/0430/5590/6973/files/23370426217.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gawezavuzasapopedamip.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_off00006cd8.bin` `48960699fcced3d106a9aeabea0db248408b74b16e3cf9bc85820ca16a8fbf40`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CD8	5524 bytes
`font_01_sfnt_off00007faa.bin` `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FAA	1800 bytes
`font_02_sfnt_off00008837.bin` `1b507fe7f3abb710346bf893d7e364c47cf8a09fe27bc267aa911c7b4547ef40`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8837	10952 bytes

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