PDF malware analysis — malicious · 23a21d779119f0ec

MALICIOUS

PDF

49.1 KB Created: 2020-09-03 02:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6da4acc5199ec823dab62780840a8bb SHA-1: 5455155f9c10fb799f312896face999dc2d6cfcc SHA-256: 23a21d779119f0ecbae36106e56872902bb9f74cdce5597b0439fff6a1b5b588

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=editorial+format+example+tagalog
- https://static.usrfiles.com/ugd/97368a_5ca23ccf169d4c7baa59f67a740fbb4e.pdf
- https://static.usrfiles.com/ugd/43d598_dea6057ad23a426683ab0b2c73719d19.pdf
- https://static.usrfiles.com/ugd/cc14e4_cce6cbc49c8b4465b66cf86349e49718.pdf
- https://static.usrfiles.com/ugd/1e8759_bac479b0e0ca47ef86e1a5f967b62b12.pdf
- https://cdn.shopify.com/s/files/1/0436/9743/8875/files/revo_uninstaller_bagas.pdf
- https://cdn.shopify.com/s/files/1/0430/8677/4436/files/teorias_ou_abordagens_da_psicologia.pdf
- https://cdn.shopify.com/s/files/1/0440/0631/0046/files/tusamoju.pdf
- https://cdn.shopify.com/s/files/1/0437/4996/5978/files/palayathu_amman_full_movie_video.pdf
- https://static.usrfiles.com/ugd/277b62_e3d464f9ebf9421b941398280eabde77.pdf
- https://static.usrfiles.com/ugd/bb3bf9_bcbdbabece0a45e792bc09c42d9354d5.pdf
- https://static.usrfiles.com/ugd/2eec94_38431c82571145b9b10cdb235379410f.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_off00007653.bin` `a52460b0bd10c0033af6511d9af5a55f792f5d642603cd1eae96754c0937547d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7653	4892 bytes
`font_01_sfnt_off00008704.bin` `3b17c87d5699968d76321e8da35e22ea1001c1145d4fe0e79a5d7a8aa8236d32`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8704	10156 bytes
`font_02_sfnt_off0000a9c7.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA9C7	4324 bytes

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