Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdff6e0387e9da28…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 20:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9c80756cb90a31ac1e23c549086f949 SHA-1: 013670b2b1ad911405eacc0456434c85582adcd1 SHA-256: bdff6e0387e9da2868222920bc8d5143712c0577cb01a3ecbe6298b855b8fe36
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

This PDF document contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded URLs suggest a lure related to 'Evil morty theme song piano sheet mu', likely intended to trick users into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many pointing to static.usrfiles.com, which may be part of a larger distribution or redirection scheme.

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=evil+morty+theme+song+piano+sheet+mu
    • https://static.usrfiles.com/ugd/e7e4a0_61359fd87d5e44aea83f2851f5286904.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3902005ac65449fa4739ab3008de5bf.pdf
    • https://static.usrfiles.com/ugd/6240f8_6b3acffc85df4f1cb1dc364a2b7214bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_72115776a4274be4a9a49a3aebd463b9.pdf
    • https://static.usrfiles.com/ugd/2ac701_58903b683d024f9d8b0029653e8ca4c7.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/3158893953.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/18170491228.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/sujunuxulodifuzemaj.pdf
    • https://static.usrfiles.com/ugd/77eba6_93ea98b27e7e49f7a2cae50d1944adcd.pdf
    • https://static.usrfiles.com/ugd/5cf23b_8d3685f233144814a5f439e535a97dd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7ef624ea4c24ec9b07957656968102d.pdf
    • https://static.usrfiles.com/ugd/d01287_8d4c6fd732c34181ad3662350d368054.pdf
    • https://static.usrfiles.com/ugd/ba3095_a10351414c6749e99533e4a6ee4c26c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bdce39293c54a7a9f3752d5b4024c03.pdf
    • https://static.usrfiles.com/ugd/83f04e_1ca0a9fd11fb4f60ad3ed9d5edcefaea.pdf
    • https://static.usrfiles.com/ugd/822ecd_469e7760a4a8489896eeb9f1b8cc70ee.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.

FilenameKindSourceSize
font_00_sfnt_off0000516e.bin
4dc77c532d00bddb67f5d7e4a03602bf10980edbd2fcce672a5b04e859135586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x516E 5232 bytes
font_01_sfnt_off00006320.bin
cb3861b1b704d5220d6956a2255d68d73bedc61d03f5e14075245be403efd744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 14204 bytes
font_02_sfnt_off00008f4a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4A 4324 bytes

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