PDF malware analysis — malicious · a61b035bd607b646

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 09:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ce26cbd7da462fefd028578609bc6833 SHA-1: 193f42eb4b37b8938cc60e65384794de579b7262 SHA-256: a61b035bd607b646dfb653dc1a4e8d9902f7527c232cdada8511bee10f5df618

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to direct users to potentially harmful content. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to disguise the malicious intent. 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.cc/wix?keyword=tone+it+up+workout+plan+pdf
- https://static.usrfiles.com/ugd/47b1e8_ccd9716f87f8421eb12a38b5c25f7b07.pdf
- https://static.usrfiles.com/ugd/b8c837_02b0a379d22746769e7362df630e0d60.pdf
- https://static.usrfiles.com/ugd/599026_28c8f3822fdc427baaad7c3d2a322e69.pdf
- https://static.usrfiles.com/ugd/804ff6_a191ed6ea05b4597904a07b5317ed5f5.pdf
- https://static.usrfiles.com/ugd/b8c837_b00186e802c0484eacef5c9b6c867c7a.pdf
- https://static.usrfiles.com/ugd/4bb894_e021719bb8d347aea50925c3b86f42f2.pdf
- https://static.usrfiles.com/ugd/f65175_7f3455b789d04cecb8722cfce9de8fa1.pdf
- https://static.usrfiles.com/ugd/516574_6379eabc15d74c4ba310c911ba7c8480.pdf
- https://static.usrfiles.com/ugd/b8c837_6abd73b545414893bd8f5d5b3e9c24cd.pdf
- https://static.usrfiles.com/ugd/c068f8_d5f07209089b43919d6a06a94217cc94.pdf
- https://static.usrfiles.com/ugd/09273f_c8ad4101524843929a8390f348d72934.pdf
- https://cdn.shopify.com/s/files/1/0431/5666/8565/files/waterfall_development_methodology.pdf
- https://cdn.shopify.com/s/files/1/0434/0776/9750/files/histrionic_personality_disorder_dsm_5.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_off000061b1.bin` `2b3e4407828e6d74b8a5562a8dab1e3b4981fcd9cd9cfdf9cf7481f88dafb34b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61B1	4964 bytes
`font_01_sfnt_off000072b7.bin` `e325505866281d4e74ff9c1c4ed8f42103279e52a73905d77c66259e1031b213`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72B7	10780 bytes

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