Malicious PDF — malware analysis report

Static analysis result for SHA-256 385863a520ca461c…

MALICIOUS

PDF

52.6 KB Created: 2020-09-08 07:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded904d2924de23fa4187d83843c5a84 SHA-1: 259e802d24be77cb88a7380a3808788bc1f17230 SHA-256: 385863a520ca461cdefcfcd01628b623a28c99c07b62a906d9eb41b69e3789c9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a direct link to a malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL and text related to 'block strike hack unlimited money apk', indicating a lure for users interested in game cheats. The PDF also hosts a large number of links to other PDFs, as flagged by PDF_SEO_LINK_FARM, suggesting a link farm or distribution network. 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.club/wix?keyword=block+strike+hack+unlimited+money+apk
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/basic_chemistry_timberlake_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/jabajugofebegogomiziwuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/24976401182.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/2499970978.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/97696557580.pdf
    • https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
    • https://static.usrfiles.com/ugd/a32c20_97c44a8fdb7140d083501a681e622cd1.pdf
    • https://static.usrfiles.com/ugd/6f58fb_71870dd1fe334c6ebcecdd3c2758d4b7.pdf
    • https://static.usrfiles.com/ugd/2e16aa_1d76184d41f14608ac5206f9d6d9d561.pdf
    • https://static.usrfiles.com/ugd/4ae4db_79fa64374f76481bba19c59268309cc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c1c7f912464944b0ff6b432dc6a691.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/gagazigapetupa.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/fizevefiledagonipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/tudagamerosuturiwelezes.pdf
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/99877854703.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/88710153009.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_off00006cc4.bin
5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC4 2880 bytes
font_01_sfnt_off00007701.bin
b22ca2754170095f2b5cc433e90c6d9fbc8c2ae983c16855a87787ee01101851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 5412 bytes
font_02_sfnt_off00008933.bin
713e7810b9f6d32ebe239a8de1c1fc775b86763dd3eaae6181f9ff8deaa0f8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 14480 bytes
font_03_sfnt_off0000b631.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB631 4324 bytes

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