Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab272b8182d390a…

MALICIOUS

PDF

52.3 KB Created: 2020-08-08 23:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6344b361d539a71516b3cc86f16465a2 SHA-1: cb2ec3327f83f5db06a6d8aa61eefaa6e33584c7 SHA-256: 0ab272b8182d390afe9504c440200786b656da2c74960aeab87531d6c3b55173
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wb?keyword=pop%20songs%20easy%20piano%20sheet%20music%20pdf, reinforcing the malicious redirector finding.

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.com/wb?keyword=pop%20songs%20easy%20piano%20sheet%20music%20pdf
    • http://files.omshantiyogaspain.com/uploads/1/3/0/7/130775734/e32a40831b.pdf
    • http://files.pursanovawater.com/uploads/1/3/0/7/130738751/poxevilapuxose.pdf
    • http://files.lindavanderheyden.com/uploads/1/3/1/3/131398457/8bdafe.pdf
    • http://files.jnsbrumc.org/uploads/1/3/1/8/131856173/fojepagude.pdf
    • https:///musescore.com/groups/omoak/discuss/5072689,��������:url-https:////musescore.com/groups/omoak/discuss/5072689,��������:url-https:///musescore.com/groups/omoak/discuss/5072689,��������:url-https:///musescore.com/groups/omoak/discuss/5072689,��������:musescore.com/user/4533721/sets/5104416
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/44414506237.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/kubaxonepobotolosif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/jonuxumalazamasibagat.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/warframe_synthesis_target_locations.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/89568573057.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/pagomupukapuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/4498180712.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/novevefenuture.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/lavewizibokovosep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/un_behindertenrechtskonvention_deutschland.pdf
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/factorio_blue_science_blueprint.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617b.bin
a73335571d10cc38c741a92bf0f7d8a4d0bc1eebfa9f3b3d926d46eb7c3822f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 5544 bytes
font_01_sfnt_off0000743c.bin
6de55477c25980846f6c3b395330e9a846f39f6f2ca7dcb27c1603d76948ffd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 2476 bytes
font_02_sfnt_off00007f12.bin
abd5368cb3ee059b2b91a7b22825f0af9ededb6cc9205b13e5fc5aaf8697034f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 14720 bytes
font_03_sfnt_off0000ae12.bin
6ff35bbcdef839a823e086214e5d609f702bf6b4484614f6c4b824d32b7fcc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE12 16204 bytes

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