Malicious PDF — malware analysis report

Static analysis result for SHA-256 a956e5026ede42a1…

MALICIOUS

PDF

47.9 KB Created: 2020-09-06 14:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f54b3c0719ca22fb93272c7d4de0c09 SHA-1: 8bba484886d4e05f5ca55beb60c9ed6137fd41e6 SHA-256: a956e5026ede42a1f5eab721e1a1fb941a2c1cb6ef285b19411d5f7466ee6722
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a malicious link farm, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. It contains numerous links, with the primary redirector URL being https://ttraff.me/pify?keyword=manual+auger+style+post+hole+digger. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to the redirector's keyword, suggesting a lure for users searching for such items.

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.me/pify?keyword=manual+auger+style+post+hole+digger
    • https://static.usrfiles.com/ugd/3eed2b_436f58d732ec456f8c6bcbdc62739de6.pdf
    • https://static.usrfiles.com/ugd/b8c837_019a09f021114217a5f58feee6ad44b6.pdf
    • https://static.usrfiles.com/ugd/b7ab08_8485b68ffb854774a9ac1d6bd4c9d89f.pdf
    • https://static.usrfiles.com/ugd/bae363_562a6faf7e064437922fc6adef495789.pdf
    • https://static.usrfiles.com/ugd/d4da64_44bb0d6fdf894736aac6513b07c69059.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_084314b56cd44506800786a07d806cc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_66def0301fec4b8982a9bcd60fb46537.pdf
    • https://static.usrfiles.com/ugd/238140_e5fdd14dadd84a97b8049cb5e2c035a6.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_289b15c9b0f14f7192cd4f94ff9d9939.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/flight_simulator_x_mods.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/xiaomi_airdots_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/91116252950.pdf
    • https://cdn.shopify.com/s/files/1/0438/4030/7362/files/remove_blank_page_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/61006238791.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/11822772350.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/15409981048.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/62472744505.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f7f.bin
d4d36cc826b2a8a2672911e94df392a5f9518b044bfe662ff69da2856a4ca671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 5328 bytes
font_01_sfnt_off000081aa.bin
5b2544465d524a921433a936f5584461941e35812af3b4ccf92405d41c099216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 15480 bytes

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