Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea1e30861f5ad9e…

MALICIOUS

PDF

47.5 KB Created: 2020-08-29 18:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6a720e5484ae21f3a9021567e695a88 SHA-1: eb52e606a192b394d962d6676b8085fd5e754bfa SHA-256: 7ea1e30861f5ad9ecece5833ea4bc9b6b0ca36cd4273ee7889754a3c5b973195
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness.

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=is+there+a+difference+between+marginal+cost+of+capital+and+weighted+average+cost+of+capital
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/39122278753.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/alibaba_40_dongalu_telugu_story.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/if_you_only_knew_shinedown.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/eternium_mage_and_minions_forum_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/how_to_invite_someone_to_discord.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc452fa2eb70412d8e14ec26c9e38961.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b0b735e20c4f308f2f9922363ccce6.pdf
    • https://static.usrfiles.com/ugd/a18aa6_127557f5acf2434fb269ee991d7d9b9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_417c0ff001e2497caa8b57bf0fc4ca53.pdf
    • https://static.usrfiles.com/ugd/3aca14_33512cb36b0d45ed82994f0e92b55d6c.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/dogenisewiliguliwiramure.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/3436367948.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8962/files/nujofadafokezizaneti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/pdf_to_word_converter_software_download_full_version.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_off0000633d.bin
5f933d561920b61d27de626b7333fb532a8fbc3c14d5e330ae845f7a64e9f1ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 5800 bytes
font_01_sfnt_off000076db.bin
8b59fe832d381bbcf1e9ae143c2af5cd5fde2392d88385c8db355d84378f66af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 10580 bytes
font_02_sfnt_off00009b5b.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5B 16060 bytes

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