PDF malware analysis — malicious · d55b5fde1b994cfb

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 21:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cebae1d817bceacba71f2ffd3ecb8ec2 SHA-1: 12b72c20841a9f723e9df615a51d7ca669b5cd50 SHA-256: d55b5fde1b994cfbbe3e2184fe4aeacc3427406235516cfe86fd975354483cf2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=battery+report+macbook, suggesting a lure related to a 'battery report' to entice clicks. 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/pify?keyword=battery+report+macbook
- http://mejad.healingstreammedia.com/uploads/1/3/1/3/131398008/5860967.pdf
- http://kuxumal.codiakacres.ca/uploads/1/3/2/6/132681579/1949138.pdf
- https://cdn.shopify.com/s/files/1/0428/7427/3948/files/95948184297.pdf
- https://cdn.shopify.com/s/files/1/0431/8606/1480/files/beauty_camera_free_app.pdf
- https://cdn.shopify.com/s/files/1/0439/4080/6811/files/zojewemonazemosavo.pdf
- https://cdn.shopify.com/s/files/1/0428/5064/8223/files/tifixi.pdf
- https://cdn.shopify.com/s/files/1/0434/2376/0536/files/40050135739.pdf
- https://cdn.shopify.com/s/files/1/0431/6944/8097/files/fiwawajumotikodaxosekipa.pdf
- https://cdn.shopify.com/s/files/1/0429/9712/1178/files/94419077604.pdf
- https://cdn.shopify.com/s/files/1/0434/2457/9736/files/2015305875.pdf
- https://cdn.shopify.com/s/files/1/0431/4575/6821/files/konekot.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d6f.bin` `d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D6F	6168 bytes
`font_01_sfnt_off00006d0e.bin` `ceaefb35fd824f0f5445354a0de48d50addde09e3f0a16642607e5762315c9a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D0E	5224 bytes
`font_02_sfnt_off00007eca.bin` `0772a7edba3ef6dda399b6c0b1fc29bc0c83e0d487adb25c3fe73a8980ea69a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7ECA	13024 bytes

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