PDF malware analysis — malicious · 1b5001e0394a86a0

MALICIOUS

PDF

41.7 KB Created: 2020-09-04 11:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0b1ee49eb754e87f6097b4c799af128b SHA-1: 2a0966ab5a00bebfa57a2837435714a29cb0f06e SHA-256: 1b5001e0394a86a08a1811ba4179818ba676424389ff601dea0765b14935d48b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=mails+blockieren+android', likely leads to a malicious site. The document also contains a large number of external PDF links, many pointing to static.usrfiles.com, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=mails+blockieren+android
- https://static.usrfiles.com/ugd/964009_5db4457983dc4d2ebeac00cee1676a06.pdf
- https://static.usrfiles.com/ugd/8b2c09_41b7f8291722454899a8c3869d1d0b15.pdf
- https://static.usrfiles.com/ugd/599026_63f0f0078ef642a4b39c576fc3a63767.pdf
- https://static.usrfiles.com/ugd/f96b02_e29621dc1e104415a8ffea846a3d437e.pdf
- https://static.usrfiles.com/ugd/b8c837_5e0003f6df384570a96f39d9c6e2e33e.pdf
- https://cdn.shopify.com/s/files/1/0439/0073/1547/files/tableau_pression_fourche_rock_shox.pdf
- https://static.usrfiles.com/ugd/2c8d66_37fdeea167cb4337aadf1ab522e8981c.pdf
- https://static.usrfiles.com/ugd/15cd4d_0a4be47a32934004b2e8e1125c4bb8c0.pdf
- https://static.usrfiles.com/ugd/a0905b_b8020deab10c4461a73c5ad4966e4cc7.pdf
- https://static.usrfiles.com/ugd/696117_c7adee8946464d4a82b68cb1e3f233bc.pdf
- https://static.usrfiles.com/ugd/ce4b7c_4b0305eb94cf494e92c52ba9ea534f8d.pdf
- https://static.usrfiles.com/ugd/41a0b6_56361839c87343849ba77b1d63f25456.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_off00005e20.bin` `57d5eef134c3c654930e29b4185bd293e7a8d94fb2b2d939a90ff9b5fe78151b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E20	5144 bytes
`font_01_sfnt_off00006fb4.bin` `71fa3625f7e40c23588e3f6a1bff344537c83e1b7efc493588643f2a1a235458`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FB4	13304 bytes

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