Malicious PDF — malware analysis report

Static analysis result for SHA-256 0addbbdf37269ff7…

MALICIOUS

PDF

41.1 KB Created: 2020-09-05 02:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42ad040b95945813259de0edaeb288c3 SHA-1: fa0ddaec0dc9d17380f3d8a63387ec8aee57c002 SHA-256: 0addbbdf37269ff792a0fc9918f305c141c0330e5d258b78477a9c448764b82f
174 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The document also exhibits characteristics of a callback phishing lure, suggesting a social engineering pretext to engage the user. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence point towards malicious intent.

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.
  • 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.club/wix?keyword=fire+and+emergency+nz+evacuation+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/affb4a_0cf03c7c501948649fc89876991f7aa4.pdf
    • https://static.usrfiles.com/ugd/11baf9_27d96846ed5243109f68f0a50c6d3647.pdf
    • https://static.usrfiles.com/ugd/8c2e83_14427b0320454a20852595e98b376c64.pdf
    • https://static.usrfiles.com/ugd/cf14a4_5eb853f9b4e64ab6a1ef4f65a60c41f4.pdf
    • https://static.usrfiles.com/ugd/89441e_cad3a79e7f4249978bda6a825dd5b255.pdf
    • https://static.usrfiles.com/ugd/6e3131_52166f3f8849428693d0119a59627329.pdf
    • https://static.usrfiles.com/ugd/2f07a1_17c90f23008f4e62b4b38fd797c16267.pdf
    • https://static.usrfiles.com/ugd/3f80ec_d69b7667bf504bbd814445d0488f04d9.pdf
    • https://static.usrfiles.com/ugd/ace02d_95f299b81af8406abe75d6430e5c7412.pdf
    • https://static.usrfiles.com/ugd/b65acf_17d43e59c43a4af6b1bb2b218aaf6854.pdf
    • https://static.usrfiles.com/ugd/4826f5_3a0de8703e414646a6592f9ef91794ae.pdf
    • https://static.usrfiles.com/ugd/269bb8_f8e9c72c6bff40aa9e9305ec984d50a0.pdf
    • https://static.usrfiles.com/ugd/4cf28d_44a8396a4c2744f1821798ae7388524c.pdf
    • https://static.usrfiles.com/ugd/97368a_c8b92cfc39c54835ac3275ce014c717f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f61697fbbfca412fad636a8277cb0085.pdf
    • https://static.usrfiles.com/ugd/c345b0_9459d0f05ad344fab9e6ce326c6e47a8.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006218.bin
987b05c8c870e9e2b84971bf8a25e11645d59230da4a6ee22d37d2e64b6b4e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5352 bytes
font_01_sfnt_off00007454.bin
64fc4a801a02f2dc72ff29a20abf4fc2fe71a30a92dd5e64932fcd42213ca00e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 10336 bytes

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