Malicious PDF — malware analysis report

Static analysis result for SHA-256 061723ed0fe37692…

MALICIOUS

PDF

64.8 KB Created: 2020-08-31 01:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59516c7659d1ef37f0cfd367d7c52ed4 SHA-1: 862dad6b9bfff2f80eec67f2e4e668265c2836dc SHA-256: 061723ed0fe376928a0bf2e83d5452324e349a8476b8bfd060747c8674f55387
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with 22 identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=arya+2+mp3+songs+download', is known to lead to malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading MP3 songs, suggesting a lure for potentially unwanted or malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=arya+2+mp3+songs+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/9678/3514/files/beethoven_9_symphony.pdf
    • https://cdn.shopify.com/s/files/1/0465/0221/5838/files/16801242230.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/diagonalizao_de_matrizes_exemplos.pdf
    • https://static.usrfiles.com/ugd/99965f_326306bae8f9491e8d989c005a05c9a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8132269b2054bcd8464b320a2d9008d.pdf
    • https://static.usrfiles.com/ugd/cf79db_6c0c8f5574af4933a0c4965ec23903fa.pdf
    • https://static.usrfiles.com/ugd/f0e51d_60b2f8707d414df397b403981a18bfbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_6860b9c7d6f949738318f04aabb7d47a.pdf
    • https://static.usrfiles.com/ugd/d78803_7e382f38f9ed4264b6fbf1a30b5d9ab9.pdf
    • https://static.usrfiles.com/ugd/f09a9d_0ece2dfe9b954fbb8ba7096111f4354f.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_45dec6b753e1426ebb1539b65a6ffa82.pdf
    • http://shorl.com/vebrutystylebry
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d5e.bin
6bfef6c9e198b72ce5d1911eecaa23e5aca36c24e427880eb6fe81348bf49a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5E 5300 bytes
font_01_sfnt_off00009f43.bin
422f03b6f0619a3e57fcbcdbeda8d9ed31d9d31e5158f62afe35778783a1b9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 7996 bytes
font_02_sfnt_off0000b7e0.bin
47f3cf717f142a995b4f8628bf384df0bddc4d119a865c05b1a722311e84e163		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E0 15736 bytes
font_03_sfnt_off0000e854.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 4324 bytes

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