Malicious PDF — malware analysis report

Static analysis result for SHA-256 f964b4881af0846c…

MALICIOUS

PDF

53.2 KB Created: 2020-08-29 15:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67867bc7f4160a84d49f09e182f053b SHA-1: 9234d3bc1f4c712d72ef3e23d98e38455efcf68b SHA-256: f964b4881af0846cbe6ea3a61c07cbf48ccc0083c3c3d904310f044c1b269475
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, also contains the redirector URL. The presence of a link farm suggests an attempt to obscure the final malicious destination.

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/wix?keyword=specific+heat+capacity+of+pyrex+glass
    • https://static.usrfiles.com/ugd/b8c837_add7538f27ef41ef8c4b9fc17cef74b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc5e5f82e5b640dd9381946428e05a81.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e98666e6881420ca5d92f3b895a63e4.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_aa48ad0fb2d14c5da8c82610b8bbaf09.pdf
    • https://static.usrfiles.com/ugd/b8c837_9616aa18dc914bb6bb01111b6d486959.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_de755a7b4e6e49b29826ade85c126bfc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f92e8f5d280947dba3e7bc5fe3922fcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1776198c692a49ec8f3057c1e0af0eda.pdf
    • https://static.usrfiles.com/ugd/b8c837_62638afceee54a0e8e2ac5723e76ca92.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_b92567ed195a451289c79bf5cd88c6ac.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/danoluxi.pdf
    • https://cdn.shopify.com/s/files/1/0452/8658/8577/files/vaxekoweniveluwefasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/couper_des_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/programa_de_educacion_fisica_2011.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c86.bin
819ed4444ebfc784d8abe4e3a44f15205f95a8566f626954faef96276d9091ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 5232 bytes
font_01_sfnt_off00007e73.bin
10dfd1d05d39c81cb88b2fc8d3ece69c42072ed1357a5c49ad3cffc72eb99ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E73 10900 bytes
font_02_sfnt_off0000a404.bin
00ef64ce827d9ab73cbf28a279315e40bbb67fde7135e8693c529adc80e0967f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA404 16180 bytes
font_03_sfnt_off0000b93c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB93C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.