PDF malware analysis — malicious · f7ab64126718ac6d

MALICIOUS

PDF

43.2 KB Created: 2020-09-04 02:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c919b9f400e22651bce41367deed75d8 SHA-1: b54f288fd225a498d753855b381e8e108d0d1f61 SHA-256: f7ab64126718ac6d51f872b4c8dbae1ba6f89ac1f33c7ec91e54dcf2e1fcc77b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm pointing to numerous external PDFs, with the primary redirector URL being identified as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure disguised as a fact sheet. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to distribute malware or conduct phishing via the embedded links.

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.cc/wix?keyword=fao+aquaculture+species+fact+sheet
- https://static.usrfiles.com/ugd/0a052f_97cb343a34294a569ea37b45a12cfdf1.pdf
- https://static.usrfiles.com/ugd/41a0b6_e26217bda2b4446687509a8c66473ca4.pdf
- https://static.usrfiles.com/ugd/90d19e_c71056fe133f4652a0b63295bca2e580.pdf
- https://static.usrfiles.com/ugd/1e4819_c003ebc648334c2f9c74c1b32f706123.pdf
- https://static.usrfiles.com/ugd/c7a620_0127416280ec4df3aca3be1b806d7e12.pdf
- https://static.usrfiles.com/ugd/40b9e6_907894bb7c584fdbb8cc0983c16aad14.pdf
- https://static.usrfiles.com/ugd/5cf23b_0d28aa8d22654388adfefb740de93fb5.pdf
- https://static.usrfiles.com/ugd/1f5cef_25c1ea410fbc4672b3c6478e92885f20.pdf
- https://static.usrfiles.com/ugd/defcb2_55a46ddc4bf24ddd96c9cd27c09733da.pdf
- https://static.usrfiles.com/ugd/7198c1_7eb5cc26087249558f31196075fab634.pdf
- https://cdn.shopify.com/s/files/1/0437/3600/6817/files/nifotodalozurowakefuvaniz.pdf
- https://cdn.shopify.com/s/files/1/0437/6998/7223/files/berlingo_van_2020.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_off00006cb5.bin` `68010c15ab0498fcd4dc3cf00c94baae18859cb3015425c1bd67bd248fc442e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CB5	5184 bytes
`font_01_sfnt_off00007e59.bin` `a2dbf272702fcb80054d95394185890ec936225dd3cbd72ec476f90592a4f875`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E59	9944 bytes

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