Malicious PDF — malware analysis report

Static analysis result for SHA-256 139fbab2bce37ee0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 02:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dcbefcea9cdbc6eedd81f2a17780921 SHA-1: 3ad508891bbc7593f48797522566ffdf0d432c07 SHA-256: 139fbab2bce37ee0f9669342b7894d39cb5dabba2f97e4c2f5a1b38c3ad55383
154 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.link' domain. The presence of numerous PDF links, many hosted on Shopify, suggests an attempt to obscure the final malicious destination and potentially leverage SEO tactics. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious redirection attempt, likely to deliver a secondary payload or phish for credentials.

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.link/wix?keyword=ati+catalyst+control+center+windows+8
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/boney_m_feliz_navidad_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/gapufifapimesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/2599407351.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/mijoganupitina.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/bavabonifalunemiz.pdf
    • https://static.usrfiles.com/ugd/74a852_faccbc9710dc448689dde90058584227.pdf
    • https://static.usrfiles.com/ugd/26938b_307968050e144529b5a3592b23e227f9.pdf
    • https://static.usrfiles.com/ugd/c1615c_06e4b80cba53435ea4e778aad43a8aed.pdf
    • https://static.usrfiles.com/ugd/3826db_28da3f7babec4f1f9e046f4397fd728f.pdf
    • https://static.usrfiles.com/ugd/9cb927_4723a3f38d3b496bbcd3cbd7b1a287f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9acd4a48cc8e4e84a570bd63d510f73d.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa28568802844c82bf3acaf25de470f5.pdf
    • https://static.usrfiles.com/ugd/e73fea_25bc92a18a834eda8cdd73ed89911f25.pdf
    • https://static.usrfiles.com/ugd/b8c837_577d03c2bc6a44589703ca04f8528cd5.pdf
    • https://static.usrfiles.com/ugd/24853a_f9b229f0ad36486aacba32c636c94995.pdf
    • https://static.usrfiles.com/ugd/39cb9d_4e92036eba27459fb2d355c83c4ca2da.pdf
    • https://static.usrfiles.com/ugd/9d869b_2d0b4cb879684605a35287b80b085c8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3430b57eb72440158e15e13c15b71568.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_228f4f53a8184599a23210af6e9676b6.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_off000064e9.bin
7a3a12b0c358739f2eb999bed01d8528db9750e8d083554dda749f1d95a5ac4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 5308 bytes
font_01_sfnt_off00007714.bin
bd8e670e1dda92f3ce99cf961e2b9098674bba2fb90b8b46f328b7149eb5002f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 10140 bytes

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