Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e48890c4dbab3e0…

MALICIOUS

PDF

98.3 KB Created: 2020-08-30 20:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beee693fc7b059a35de6f69681894d7c SHA-1: 393d06dca9ab3b5173c6f47c6a7b7569611a769c SHA-256: 0e48890c4dbab3e0e8b956f84d27104af382c0eea85caef5a51d7e013ddfb05e
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a password-protected archive lure and a callback phishing lure, suggesting an attempt to trick the user into downloading a payload or engaging in a scam. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/wix?keyword=eset+nod32+indir+gezginler
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de3d83_641afee759e34a9cb9daa7a829264937.pdf
    • https://static.usrfiles.com/ugd/b8c837_07afa77f3e634e66b134aafe6a3cc6c7.pdf
    • https://static.usrfiles.com/ugd/24853a_051d846d5aec4942b5e544faa5536144.pdf
    • https://static.usrfiles.com/ugd/b8c837_5428e0bdcff242df9558c1964139c32d.pdf
    • https://static.usrfiles.com/ugd/d902bb_8d578d2bbd6b4fae8c2d9266c24c20b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_25ce794ea87541828f2e8ce8877a5f8f.pdf
    • https://static.usrfiles.com/ugd/3649d2_29c0bbe3c47e4d59a15128e764952b25.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a50a45c061fe4bffa23b8621cea0fe5e.pdf
    • https://static.usrfiles.com/ugd/21e6f2_00219010bd384ec58cad6e950e101979.pdf
    • https://static.usrfiles.com/ugd/8de238_1bf0c052c85c4e58af47bd63693f60f5.pdf
    • https://static.usrfiles.com/ugd/ab922d_de70c2b583044d96a585f542b7a685d3.pdf
    • https://static.usrfiles.com/ugd/e33828_b49670bef18443a0b35f7e0e36fc6ee2.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3737/files/meningitis_bacteriana_en_adultos_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/75667220743.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c93.bin
684c55715a5cc87df21e693791993b85e62258afe4c246f4e45c3a65ae83aed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C93 5088 bytes
font_01_sfnt_off00013df9.bin
95df2a179ec9b939b28c7ad34bc33686cdd3bb8786a508b4d858d171b8420414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF9 12564 bytes
font_02_sfnt_off0001656f.bin
5b45d8957cdd618c0f157c507058aef1810e6158bb3d1abf257796d6008f54d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1656F 16060 bytes

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