PDF malware analysis — malicious · 53a4f0f07b469e7e

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 12:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7de255ba29e988f8068975fd5f3dfdb1 SHA-1: 23b81292543e549cdfda3ff4d34eec598103f620 SHA-256: 53a4f0f07b469e7e7867db84ebdd7b33d9a2ca759f66fd9daa4f8719705c8a62

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=social+studies+reading+comprehension'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links, many of which point to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL and several benign URLs from the 'static.usrfiles.com' domain. This suggests a social engineering lure designed to redirect users to malicious infrastructure.

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=social+studies+reading+comprehension
- https://static.usrfiles.com/ugd/9c43ec_684958933dfa4bbda71c88296d9a5cd9.pdf
- https://static.usrfiles.com/ugd/b8c837_4cf83f491a9749a1b00babc78116eb85.pdf
- https://static.usrfiles.com/ugd/7d1dc9_17e8afdebe90440796a0accdc3f3e864.pdf
- https://static.usrfiles.com/ugd/cf14a4_0a688902d1514a5e8097240173983c75.pdf
- https://static.usrfiles.com/ugd/704566_8e7ea9d35b9c44fb9aa0acdb6da005e7.pdf
- https://static.usrfiles.com/ugd/b8c837_93101a807d464f42903c65c8a4de4a78.pdf
- https://static.usrfiles.com/ugd/b28561_393a9db05b504d12a143a803c9760dc2.pdf
- https://static.usrfiles.com/ugd/ea5d7b_7202fb43532b41f9ab7064d4aa4de1c4.pdf
- https://static.usrfiles.com/ugd/ce5d00_2d0c3e4935164bff945462f768145ce0.pdf
- https://static.usrfiles.com/ugd/b8c837_fcd7010f44864e0495c381b9c7c8127f.pdf
- https://static.usrfiles.com/ugd/71fd01_95f15af14a6e45dc9b0eb3b28baa5df3.pdf
- https://cdn.shopify.com/s/files/1/0437/8758/3650/files/transformers_megatron_autobot.pdf
- https://cdn.shopify.com/s/files/1/0436/3337/7440/files/ditazazogegasetisek.pdf
- https://cdn.shopify.com/s/files/1/0465/5477/5702/files/de_mthuda_blissful_day_free.pdf
- https://cdn.shopify.com/s/files/1/0436/0175/6323/files/shoulder_king_and_country_lyrics.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_off00006664.bin` `a0e2a35c0847e2a7abdbc5464f4e49a3f5a182e3d305fd9260770e2347ab96f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6664	5592 bytes
`font_01_sfnt_off0000791e.bin` `75a20073d1355d72a533734b17b4a63a18c25516f99e2dc54b013c173da527a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x791E	10852 bytes
`font_02_sfnt_off00009d23.bin` `436641947e2d9e0bebbccd1ec2c71d05ceb78c9941d06bdfc50d0b7acf9b0360`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D23	17288 bytes

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