PDF malware analysis — malicious · 909a32bbdbce456f

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 18:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b9f97c2c8e5303b57c083b87eb010e84 SHA-1: 828cd16cbd54d0d754e6359c5f245f43d7314b8d SHA-256: 909a32bbdbce456f491e7eaeeb347ee58e1b58979f45f0c78e98b5d089cd4da9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm or redirector, potentially leading to further malicious content.

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/pify?keyword=marines+hymn+sheet+music
- https://static.usrfiles.com/ugd/784815_0a92b25231564277aee4492913e21801.pdf
- https://static.usrfiles.com/ugd/e643da_1d25515a94824ec68a7c6193a4e57ebd.pdf
- https://static.usrfiles.com/ugd/fbccce_61d4054d86544648ae9780a3175cc15b.pdf
- https://static.usrfiles.com/ugd/930050_62d3333e25f14a0081471b593bcb70f6.pdf
- https://static.usrfiles.com/ugd/0049ca_a4ef2b9972554baca815fc9f270be44c.pdf
- https://static.usrfiles.com/ugd/b8c837_557249ec494e4881a9f2d85c22145eb4.pdf
- https://static.usrfiles.com/ugd/b8c837_c814ec9e8d5f4d37a4242c2764b8751f.pdf
- https://static.usrfiles.com/ugd/5fd5c1_066a23a3846642418b6413e52a86cc6d.pdf
- https://static.usrfiles.com/ugd/bfbc46_e3edf9cc62144dd6bfb6735b24d74575.pdf
- https://static.usrfiles.com/ugd/b8c837_d8dff59e5c2c43229374fb4de79b666b.pdf
- https://static.usrfiles.com/ugd/fb83f1_064ed492a462463d9cda0886c5b1cdb7.pdf
- https://cdn.shopify.com/s/files/1/0437/2201/4885/files/34448399042.pdf
- https://cdn.shopify.com/s/files/1/0432/8757/6740/files/alumni_speech_by_ex_students.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_off00006142.bin` `47795b2771f9d0d81d6475047a7169edb0f42e8f7d42d2a62dcb1ed4a0d53279`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6142	5112 bytes
`font_01_sfnt_off0000728e.bin` `05a3ca640a59be648114cd67fcd60205b28dea773f947b2b126141dd7dd3d852`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x728E	10120 bytes
`font_02_sfnt_off00009546.bin` `15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9546	16120 bytes

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