Malicious PDF — malware analysis report

Static analysis result for SHA-256 01919e4d040ebb12…

MALICIOUS

PDF

198.4 KB Created: 2020-08-24 01:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 506120c86f075ac76118d2cb8395f6be SHA-1: 347fe17002344b3f1f9dccfc9081aed0ef80c3e9 SHA-256: 01919e4d040ebb1214e7d82b9275f885439101efb27f84a6d87663e6ff1bcff2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain the same URL, suggesting the primary purpose is to trick the user into visiting this malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=idsa+mrsa+guidelines+2016
    • http://files.safsj.org/uploads/1/3/1/3/131381640/8085115.pdf
    • http://gajoru.rstne.com/uploads/1/3/2/8/132814930/8351640.pdf
    • http://mefaner.3blossomscafe.com/uploads/1/3/2/8/132814439/3079174.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/57649942859.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/logegiperazot.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/juvitup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/9694706245.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6513/files/vikixoxabibejowevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5073/files/raresozivegepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/bupusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/canadian_citizenship_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/2147/3691/files/relative_clauses_exercises_3_eso.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/230_220_x_0._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/xenazane.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_off0002a524.bin
c57baf985c52bf6fa59ecdecfa441b485d7c62f53ffb9bf662d63b89d85ad967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A524 5256 bytes
font_01_sfnt_off0002b6d9.bin
b216cda6dcd2150db2c7739871042e4899797d3939a07e26762b3f96f012aee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6D9 15368 bytes
font_02_sfnt_off0002e7da.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7DA 16148 bytes
font_03_sfnt_off0002fcd1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCD1 4324 bytes

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