Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daf2094c6264f50…

MALICIOUS

PDF

47.7 KB Created: 2020-08-17 06:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bca73d009e394dbed02b29e222b294b SHA-1: dd94dad6cc8a6de746b0ef8540951eb50e8598db SHA-256: 0daf2094c6264f503329c5068150dd3c620cc13102807b4af2a0ccf0c86ce643
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to appear as search results for 'chrome extensions website'. One of the primary links directs to a known malicious redirector. The document's content and heuristics indicate a social engineering lure to install browser extensions or updates, a common tactic for credential theft or malware delivery.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=chrome+extensions++website
    • http://files.outofruins.com/uploads/1/3/1/3/131384229/9959465.pdf
    • http://files.joquinn.com.au/uploads/1/3/2/6/132683087/75c25a1350.pdf
    • http://files.kellytuckercreates.com/uploads/1/3/1/6/131637419/nunolabux_gotevupuw.pdf
    • http://files.menasgerovei.lt/uploads/1/3/0/8/130874361/498984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9721/1558/files/5519130299.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/fadigubejuvuxenuwagukew.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/ez_go_txt_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/jebemoroxunelabag.pdf
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/ximosaxuzibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/partituras_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/kawekezukisari.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/argyll_forest_park.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/11776076414.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070d5.bin
595b6a34427537a1838fdd1061c3d2855f9c6be80a31672b73f538522ab21043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 4792 bytes
font_01_sfnt_off00008109.bin
3f54bd6a699f8d55bb327952957f2b1124098a6e18d9560b7361c5bbc4d31422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8109 10292 bytes
font_02_sfnt_off0000a453.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA453 4324 bytes

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