Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ae1d150c85815a…

MALICIOUS

PDF

54.3 KB Created: 2020-08-24 00:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ddd77acd9c165d195d20a2866d33b9 SHA-1: c5fcc7c31833c5c396f2ca166be68507d35eeb9e SHA-256: b2ae1d150c85815abaee7510936b3cee94eb93dc92ccd6f523929629fe63aba4
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `https://ttraff.ru/pify?keyword=enigma+variations+piano+sheet+music`. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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=enigma+variations+piano+sheet+music
    • http://files.desertjewelsinc.com/uploads/1/3/2/6/132695200/43581.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/suxidojodamumijamisafeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/championship_manager_java_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/vozosekakusegimup.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/the_ballad_of_buster_scruggs_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/training_camp_cissp_supplemental_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/45488239029.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/16341755581.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/liberalismo_historia.pdf
    • https://cdn.shopify.com/s/files/1/0445/5186/4484/files/3263047627.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/67238960785.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000594f.bin
8d77df718f8db01e40e6fe1ba8d9bf2710bd7cb840fe7cd6904807db7fc8129a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 5216 bytes
font_01_sfnt_off00006ade.bin
f93542dbf11e1b78b0e03947724839818dd350ad06a5f6d49fbf9462215d74ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 2060 bytes
font_02_sfnt_off00007485.bin
f758791e6b4f2869ea4745e233c4c71f53a9261c981e43d313c77f20b9c44748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 15968 bytes
font_03_sfnt_off0000a694.bin
2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA694 16120 bytes
font_04_sfnt_off0000bb7b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7B 4324 bytes

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