PDF malware analysis — malicious · 26b925125b21c236

MALICIOUS

PDF

52.3 KB Created: 2020-08-31 12:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e9c947c4d7365ed1c91cf15d64cdfd15 SHA-1: 8acc95b09ba41fcb761a9649f87cbd6d7c762fc2 SHA-256: 26b925125b21c236dd8c09615595272d8c937ff78e9480b168f9f8a74f9e0205

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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.com/wix?keyword=strategic+choice+suitability+accepta
- https://static.usrfiles.com/ugd/b8c837_3d6b61e60e3f448f8a4c378df59dd932.pdf
- https://static.usrfiles.com/ugd/b42fd6_69290d75bf5f48eca992c5a75de04187.pdf
- https://static.usrfiles.com/ugd/c618e9_527c4facc3ca4d4fbae0d6cb7d441a7c.pdf
- https://static.usrfiles.com/ugd/60933b_383fdfdddc2245b4a580c28ba0d8c37a.pdf
- https://cdn.shopify.com/s/files/1/0432/2036/9576/files/elementary_fluid_dynamics_acheson_so.pdf
- https://cdn.shopify.com/s/files/1/0431/7092/2655/files/lotaxikomi.pdf
- https://static.usrfiles.com/ugd/a298ce_dec2ad3295b549239b61d80854cb5d7f.pdf
- https://static.usrfiles.com/ugd/b8c837_459574c9743243d98399766eae500ad1.pdf
- https://cdn.shopify.com/s/files/1/0435/9307/2808/files/55072209535.pdf
- https://cdn.shopify.com/s/files/1/0434/4718/9670/files/baadshaho_full_movie_hd_1080p.pdf
- https://cdn.shopify.com/s/files/1/0428/5192/6183/files/kubudem.pdf
- https://cdn.shopify.com/s/files/1/0428/1001/5910/files/96871163585.pdf
- https://cdn.shopify.com/s/files/1/0433/7015/2088/files/61089502385.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_off00008df1.bin` `fbcbe1323b3c2232ffb47afe4a7550ab90112fc14a8be6492865a31bb7c5cd2a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DF1	5540 bytes
`font_01_sfnt_off0000a0bf.bin` `44304fe6600ddfd6d5aef3e2ec85dd983a0785d8aefee092cf04a38207ebad5c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0BF	10396 bytes

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