Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d6158ee62c9e62…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 13:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359047411cb9690b6cadc167649d5371 SHA-1: 0790f8da7cb40cb3d3f5976edf19a613a0bb9dc5 SHA-256: e7d6158ee62c9e6269c53a00d8680605723bc58d6b8ef4ed4a754f336343547a
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'. The document body, though heavily obfuscated, contains the same URL. This URL is presented as an 'Xbox live ip grabber', suggesting a social engineering lure to trick users into clicking the link. The PDF also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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=xbox+live+ip+grabber
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/91653508297.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/20928384491.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/70271957216.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/all_information_about_cricket_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/jinira.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/36826305797.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/1986855294.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/bocio_coloide_nodular.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/17769310166.pdf
    • https://static.usrfiles.com/ugd/b8c837_4122a60ba22740319772efdb9658b1f8.pdf
    • https://static.usrfiles.com/ugd/405339_900a32b974f2419abad7ad0bab24bea6.pdf
    • https://static.usrfiles.com/ugd/fa6f14_2f3313c85e9e4f6ab304988b7f110b71.pdf
    • https://static.usrfiles.com/ugd/b8c837_41dbeb698bd24e83b59ff60dc4f5f003.pdf
    • https://static.usrfiles.com/ugd/b11f6d_c0aff8a4cbb946bdab8ecb5c4f810b61.pdf
    • https://static.usrfiles.com/ugd/0047a4_6119f75358654281b7f8399c8080ab25.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a0445fbf03441d0a8e13c78aaf8a6cc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005737.bin
e1696cbd4a2eae1906c6a6944428574cfe61e964ccc8ad6f1742811f189ecbfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 4656 bytes
font_01_sfnt_off00006716.bin
92e9054abe0166ccf783c31d8e9fc178227026d8ee848b230886e27e7fa2e34e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 10480 bytes
font_02_sfnt_off00008b1f.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1F 16092 bytes
font_03_sfnt_off00009fe6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE6 4324 bytes

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