PDF malware analysis — malicious · 9acd1d677deedb04

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 13:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3136eb65562c1a5ee1107372f7667abd SHA-1: c3b1db3618e91322ab4d11cabaaa4aed4e8838de SHA-256: 9acd1d677deedb04ab034c3b333e8d771e8716a917bbf4b3ec44758f9b556342

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic firing indicates that a link points to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and appears to be part of a link farm strategy, with numerous links pointing to 'static.usrfiles.com' and other domains, likely to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=siyasi+tarih+kitaplar%25C4%25B1
- https://static.usrfiles.com/ugd/b8c837_e023013883454fd4b69c07d462d57702.pdf
- https://static.usrfiles.com/ugd/a76634_4567c26a549a4915a38979b1e5278993.pdf
- https://static.usrfiles.com/ugd/b8c837_b01b54efad984754a2f8fd1c8321ce2c.pdf
- https://cdn.shopify.com/s/files/1/0431/0492/7905/files/45015992634.pdf
- https://static.usrfiles.com/ugd/b8c837_95a10b81cf5340b9a07e7fe26bdcb1bd.pdf
- https://static.usrfiles.com/ugd/b8c837_d7c65f4eefb24aa798b27752c20575a6.pdf
- https://static.usrfiles.com/ugd/b8c837_dfe27579825242e195fc597e4d0366e4.pdf
- https://static.usrfiles.com/ugd/b8c837_b0c5c8310f484135a19d3c23c33bc028.pdf
- https://static.usrfiles.com/ugd/bfbc46_ed7a2143cd2141d9818ca08830d74476.pdf
- https://static.usrfiles.com/ugd/b8c837_ad6d2c485c094095bf5fe1d150aad627.pdf
- https://static.usrfiles.com/ugd/b8c837_9834e1e9e83c414aaf4f83f6f630fcc7.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_off000067a8.bin` `718160491d8728fc98fa7f3f95f7c06bfcb81abb6288e34b804c7d3a9eff7a45`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67A8	5208 bytes
`font_01_sfnt_off00007959.bin` `2a35469d61ed3a6fa5c11a199130311e5d2da8201c40f6614f16933dc920b083`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7959	13088 bytes

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