Malicious PDF — malware analysis report

Static analysis result for SHA-256 60be195a9e05f7ac…

MALICIOUS

PDF

51.6 KB Created: 2020-08-22 02:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65930cb54f4d427066f8b11f0519bb2b SHA-1: 29a5cf6741fd65c391fba461474190fe4ebb85ad SHA-256: 60be195a9e05f7ac70654d0f69f74efe5adf8e1231db9904a6916d25d8f39eb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to lure users to malicious sites. The presence of a link farm heuristic further indicates a malicious intent to distribute content or redirect traffic.

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/pify?keyword=font+angsana+new+windows+10
    • http://files.effroncompany.com/uploads/1/3/1/8/131856392/dec7823753d.pdf
    • http://zudemuk.clearchoicewc.com/uploads/1/3/1/4/131438541/pibijumo_wabew.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/konukisunese.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/19074331558.pdf
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/cookie_clicker_dash_net.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/50306059369.pdf
    • https://cdn.shopify.com/s/files/1/0462/6766/2490/files/aristella_ariston_manuale_d_uso.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/xamarin_android_app_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/2901/1359/files/bruchrechnen_bungsaufgaben_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/34684957288.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/84144507653.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/25780932233.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7542/files/riboripero.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/46494802651.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/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005cd4.bin
c3dd0aed81c06f6a4e2a3eff0d2850fdf97fb7da29a39a769434d7275ed9f5e4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5CD4 13092 bytes
font_00_sfnt_off00004b54.bin
b99c689e2cebeae7a85f2f4af0b1c6d37652c71df4400b5f1805d952f87b71bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B54 5104 bytes
font_02_sfnt_off00008101.bin
e73529ab126d81a18d91e66b58d6d49868b5161aa498b44ebcd340406a37eb08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 13844 bytes
font_03_sfnt_off0000abd0.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD0 16204 bytes

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