PDF malware analysis — malicious · 351e69c264438898

MALICIOUS

PDF

53.7 KB Created: 2020-08-30 01:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c1a72004d51af9d51ed546cb1c29555f SHA-1: 8c704130556a602d30f8d4bbb2c426210942c598 SHA-256: 351e69c2644388982ae369c50e20817d5723dde7ab409baa47a6b002c174dbb2

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm or SEO abuse. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While the document body is heavily obfuscated, the presence of these links strongly indicates a malicious intent to lure users to external, potentially harmful, resources.

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/wix?keyword=database+default+needs+evolution
- https://cdn.shopify.com/s/files/1/0434/1799/3366/files/64405506009.pdf
- https://cdn.shopify.com/s/files/1/0435/1960/6936/files/40013108883.pdf
- https://cdn.shopify.com/s/files/1/0436/4356/8278/files/30651104799.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2687/files/strona_bierna_angielski_zadania.pdf
- https://cdn.shopify.com/s/files/1/0431/6856/3355/files/20335820400.pdf
- https://cdn.shopify.com/s/files/1/0462/8466/9088/files/muzevaretibularanumub.pdf
- https://cdn.shopify.com/s/files/1/0430/2117/2897/files/gs_convert_to_png.pdf
- https://static.usrfiles.com/ugd/4d6844_34b26cf9ec094633be4988fddfa723e6.pdf
- https://static.usrfiles.com/ugd/9e53d4_f5b4bc2f826e4604b93bd4155eaeaaac.pdf
- https://static.usrfiles.com/ugd/ce77c6_3a9d91d583594949b524c1632b4ff145.pdf
- https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
- https://static.usrfiles.com/ugd/b8c837_5a73af7e2b0f4ecca4c2399887728be6.pdf
- https://static.usrfiles.com/ugd/b8c837_39557059412d42bda1aebf6696bb70ad.pdf
- https://static.usrfiles.com/ugd/19103d_0cd2f78fcd614b529ef19ff4f2a312bb.pdf
- https://static.usrfiles.com/ugd/b8c837_718fe999dfbf4161b05b24b2e5b4d640.pdf
- https://static.usrfiles.com/ugd/b8c837_20e37c5d833c42aeb7bbb095db66a8da.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/
- https://cdn.shopify.com/s/files/1/0430/2117/2897/files/gs_

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000081a5.bin` `f1ad4b07dc16b48b67ede16dfd2593dc69cf5ed8c67d4109e9fbb101464e5035`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81A5	5004 bytes
`font_01_sfnt_off000092be.bin` `3909f1220969b87f0236ab4439c1f857d8df0352ff0deb57ccc1d232c05060f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92BE	17080 bytes

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