PDF malware analysis — malicious · 8cc0d67be0402180

MALICIOUS

PDF

66.5 KB Created: 2020-08-31 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 10d47bc41d644a97bcddd685b57b8342 SHA-1: 558dd5fbbd660e7c227106c4ea914461e85f72b7 SHA-256: 8cc0d67be040218022567b048f6b1326450d2d507b7fd2f05da2be854357638e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.ru/wix?keyword=paranormal+witness+season+5+episode+5', is likely intended to lure the user to a malicious site.

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=paranormal+witness+season+5+episode+5
- https://cdn.shopify.com/s/files/1/0431/4929/5776/files/lemifuwek.pdf
- https://cdn.shopify.com/s/files/1/0433/9279/4774/files/26908726570.pdf
- https://cdn.shopify.com/s/files/1/0433/0638/5576/files/notes.pdf
- https://cdn.shopify.com/s/files/1/0432/0441/1556/files/2723414068.pdf
- https://cdn.shopify.com/s/files/1/0434/4378/1788/files/15875854635.pdf
- https://static.usrfiles.com/ugd/c618e9_34ba80e487764ad5b0872dd7d422336c.pdf
- https://static.usrfiles.com/ugd/b8c837_336d3089a682468f804f0b8855b4b0a6.pdf
- https://static.usrfiles.com/ugd/0511f5_fa0980cbf5cc494db58ddf48de9a2e45.pdf
- https://static.usrfiles.com/ugd/db1da1_f7e4ad549f114153b051f822684f5ed0.pdf
- https://static.usrfiles.com/ugd/b8c837_f3ccfa5318e0416481487136abdd8442.pdf
- https://static.usrfiles.com/ugd/078c79_d9d9df2ec9614144bf919fb9fe4f2477.pdf
- https://static.usrfiles.com/ugd/b8c837_acb65cb6c3934250a59a3fb7c9b09f1b.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_off0000c67f.bin` `1d08b3825b84d7fb28142c2dcf5b7735bdbc2c47cf09fd740f0242cf110762df`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC67F	5320 bytes
`font_01_sfnt_off0000d888.bin` `56c195e8d97c0af0daf75a2b4798820dfe7ca78ca2aad77752ef64d773253287`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD888	10780 bytes

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