Malicious PDF — malware analysis report

Static analysis result for SHA-256 0adc6409183307ca…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 23:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee8ed86b50ad66aa594984d92ac6fc08 SHA-1: 3ea1e1b02ed097b85f148755026d5c8e7afa2f75 SHA-256: 0adc6409183307cae63b06b4395a52f2e21a7009feab173d473933203a6e645f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.link' with a keyword suggesting a lure. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs hosted on 'static.usrfiles.com', some of which are also flagged as potentially part of a link farm. This suggests the primary goal is to redirect the user to malicious content.

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.link/wix?keyword=jurassic+world+the+game++play+store
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_0f60d54d460443c2ae9fed21168741c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1090561acb51407e9a75fb0299b9f7d8.pdf
    • https://static.usrfiles.com/ugd/6290de_f7cc47c74c95469fa986d11811d4b4bc.pdf
    • https://static.usrfiles.com/ugd/726ec9_47d5bb049c0a4210b9aee3fa0091a7fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_19154cf37f1f486abfee7d2ebc6f5201.pdf
    • https://static.usrfiles.com/ugd/0c4177_e164bf378cf14f1fb39b337eff3ce75d.pdf
    • https://static.usrfiles.com/ugd/0779a3_ec0b20477d1a4c47ac9184857099cf16.pdf
    • https://cdn.shopify.com/s/files/1/0452/0984/5911/files/ferovuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/wegabudafodenilimuzes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/zibudupibonal.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f3e755c7684819adf616f6772488ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c8ef90836e44f9cbfe21057f7cca750.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://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
font_00_sfnt_off0000599d.bin
76a6d000d37feb770e746a7948b80e327e0223dd5694d6d2d3767ca018371a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 5672 bytes
font_01_sfnt_off00006cc7.bin
7c4e7c28dae9a4f3056cf21d6284d9148ef17ef30849019f61463be8475b85fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 4120 bytes
font_02_sfnt_off0000782d.bin
afc9d3dba55fd734f6ce370ac3f7cb4384c00abdbc7caf65e4837789266649be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10772 bytes
font_03_sfnt_off00009d3f.bin
6dba5854a972f11ea50690dbd10bd732b527f03a7f02b22fceaad647e390bf0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3F 16392 bytes

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