PDF malware analysis — malicious · 122547d2dbec347a

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 23:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3b36b1a0d4a45154a4c6fa81c150aa4c SHA-1: 4dcaf20e84c25aa18bf72807ec330025e60ebf5d SHA-256: 122547d2dbec347ad451d579a7fb33479b8570c5c795bc65703338d486f38bb0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with one link identified as pointing to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious with high confidence. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests an attempt to direct users to potentially harmful 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/pify?keyword=abeyance+verb+form
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0438/3621/1362/files/yearly_calendar_template_one_page.pdf
- https://cdn.shopify.com/s/files/1/0431/1734/6965/files/57441886503.pdf
- https://cdn.shopify.com/s/files/1/0434/0695/0557/files/carrom_pool_game_hack_apk.pdf
- https://static.usrfiles.com/ugd/cac9e4_e0899f9235bb438d9ba7bf250af75ba7.pdf
- https://static.usrfiles.com/ugd/ad2ade_8a22b8ed5e7b4b1c8c7f817031c01b5d.pdf
- https://static.usrfiles.com/ugd/7e6083_1449c665c179444f8f426f4f8dd544f0.pdf
- https://static.usrfiles.com/ugd/430cb2_25f0c5751e094ef0807e6df539ac20ef.pdf
- https://static.usrfiles.com/ugd/e5cbe5_dbc53bdbb9934285bda7ab9f6e50a6f1.pdf
- https://static.usrfiles.com/ugd/73c254_4788aa47f71043a2ab688aea8f2a33ba.pdf
- https://static.usrfiles.com/ugd/b11f6d_0338f0996b0d49f1b8930680af3c2421.pdf
- https://static.usrfiles.com/ugd/04c368_9f69bf3cd18f4176954388adbd550313.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d55.bin` `f2cbc8ed4fa5b33084c46b4173f549fb486ab34c888d923004ea711e9505d8ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D55	5108 bytes
`font_01_sfnt_off00006eb6.bin` `9726acb0c95a9b250c3dda62d3984e9b900226bb24ea81205512e826041a21ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EB6	10572 bytes

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