PDF malware analysis — malicious · ad0f9651bb109172

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 05:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dc5ad58cfcf1a2a4e76b9dff030048f2 SHA-1: 8d7d8b44be3ec134a6bfef271a2fcc279b43db18 SHA-256: ad0f9651bb1091722c88397ccb23f0ac8bce29f4600caae24a45bbaf506c9e4f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified as a link farm, pointing to a known malicious redirector. The primary malicious URL is https://ttraff.ru/wix?keyword=electronique+et+modelisme+ferroviair, which likely serves as a gateway to further malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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=electronique+et+modelisme+ferroviair
- https://cdn.shopify.com/s/files/1/0430/4440/5397/files/navonixe.pdf
- https://cdn.shopify.com/s/files/1/0438/0511/4528/files/74096374548.pdf
- https://cdn.shopify.com/s/files/1/0448/0168/7714/files/munda_lineman_lagya_balkar_sidhu_song.pdf
- https://cdn.shopify.com/s/files/1/0430/7730/4484/files/fogekuxutudesiwinotal.pdf
- https://static.usrfiles.com/ugd/b8c837_446338321e9c404c8df91cf8cb58e0c2.pdf
- https://static.usrfiles.com/ugd/b8c837_9f0762c458cd4268a4fb6e90216b3018.pdf
- https://static.usrfiles.com/ugd/b8c837_25e0a9a0dc4643eda55d598c940331ee.pdf
- https://static.usrfiles.com/ugd/b8c837_8bcff15cfa1c4370b1d950ab64693aab.pdf
- https://static.usrfiles.com/ugd/b8c837_af2cee9a670f4813b69f73cfc40e8136.pdf
- https://static.usrfiles.com/ugd/b8c837_1ff450ac5f9949308258a50bb3cd977b.pdf
- https://static.usrfiles.com/ugd/b8c837_c02035af460e4bfc92c6e51eb577c4a0.pdf
- https://static.usrfiles.com/ugd/b8c837_f87842bb954040feacd7262a1cad6ae1.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_off00005cdc.bin` `806ac8c2fa2684e8fdc82007d280c7c19e8f66074a8ed7b5498f5aa3253a4a0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CDC	5312 bytes
`font_01_sfnt_off00006ed3.bin` `2da9e9228ce006c0f114d9fb59c53364b35e220138db7c9595dd6109bf351dfc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ED3	12420 bytes

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