PDF malware analysis — malicious · 2cf288c56155697c

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 02:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 261dff0cace31cce843f34ab8d7de73e SHA-1: f3e54b66866b0a9cca64468d04e363f46456a127 SHA-256: 2cf288c56155697ce4b21cdd8a1e354ed86cf704164b2450194a2083d02b05a2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same text as the URL's keyword parameter, suggesting a lure. The PDF also hosts a link farm pointing to numerous other PDFs, likely for SEO manipulation or to spread malicious content.

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=ejemplos+de+amparo+indirecto
- https://static.usrfiles.com/ugd/865d50_809c1bb902fa45f7b3440f273eb63466.pdf
- https://static.usrfiles.com/ugd/de3d83_d94fef9e0562485ca286563cf4f15218.pdf
- https://static.usrfiles.com/ugd/b8c837_f1e06005e5c64826bc3d3fd4e5c672fe.pdf
- https://static.usrfiles.com/ugd/b8c837_7ecafe7353ed4ead9ff7b02385f5eb06.pdf
- https://cdn.shopify.com/s/files/1/0437/5393/0901/files/12820173964.pdf
- https://cdn.shopify.com/s/files/1/0432/9321/2827/files/11439717512.pdf
- https://cdn.shopify.com/s/files/1/0431/1977/1799/files/85371999206.pdf
- https://cdn.shopify.com/s/files/1/0429/7211/9193/files/xawatunagolidanuraweguliz.pdf
- https://cdn.shopify.com/s/files/1/0434/1992/6679/files/weguposez.pdf
- https://static.usrfiles.com/ugd/93c935_6c92c0b8f6754008a098fbac28f3c719.pdf
- https://static.usrfiles.com/ugd/5926b4_66021b7ea103457ebfdad37d09074ded.pdf
- https://static.usrfiles.com/ugd/e2f7e1_a83bf8d1da4c4a3f86329513e3af230e.pdf
- https://static.usrfiles.com/ugd/b8c837_7e21ccbca95d4bb39aa29dc03c6e41eb.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/1/0431/1977/1799/files/853

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006035.bin` `05f87564a44d5026aa556ec5e51eb88e322764d6deb20db47a1b0d945b750e24`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6035	5252 bytes
`font_01_sfnt_off000071fb.bin` `f6fe171ed27961ee8ce05a33d58a1fdaa0214122ce92593db19e06315b81bd3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71FB	11180 bytes

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