Malicious PDF — malware analysis report

Static analysis result for SHA-256 62126c01cde74ec1…

MALICIOUS

PDF

44.3 KB Created: 2020-07-10 17:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ea0f35e19a057d32fc2fbf2728f68b7 SHA-1: f383dab5ea29a15e97be9e39906638eb0b30aec4 SHA-256: 62126c01cde74ec1a86020de75a4445f6b17bbf547b4a41b6225e487eeb931a1
154 Risk Score

Malware Insights

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

This PDF document contains embedded links designed to redirect users to malicious infrastructure, masquerading as a search result for 'best free pdf readers for windows 10'. The document also hosts a large number of other PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link farm or redirection attack.

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.cc/wb?keyword=best%20free%20pdf%20readers%20for%20windows%2010
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://files.mosaicartbyabbe.com/uploads/1/3/2/7/132740545/zumuzibezusu-zofivixut-xadugofamifu.pdf
    • http://files.caninearthritisandjoint.com/uploads/1/3/0/8/130813409/9348804.pdf
    • http://files.salt-tz.com/uploads/1/3/1/4/131406303/todejoseditet.pdf
    • http://files.rootedfoodco.com/uploads/1/3/0/9/130969830/7872af12.pdf
    • http://files.willowickbaseball.org/uploads/1/3/1/3/131379252/nedesekovoboxumibufa.pdf
    • http://files.krwoodworkings.com/uploads/1/3/1/8/131871894/1591208.pdf
    • http://files.mt-bethel-umc.org/uploads/1/3/1/0/131071037/jefuzarozijigase.pdf
    • http://files.lisamccafferty.com/uploads/1/3/1/3/131383664/bamibitamurata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://peroporil.files.wordpress.com/2020/07/labozonomijometuj.pdf
    • https://razibasu.files.wordpress.com/2020/06/31504803261.pdf
    • https://mamuxulajibi.files.wordpress.com/2020/07/ravibesipebaxatosojevozan.pdf
    • https://rujudigunika.files.wordpress.com/2020/07/54098520042.pdf
    • https://xivatuzivo.files.wordpress.com/2020/06/ropusir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/15494720211.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52876055892.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_off00006e61.bin
5b445e017dac8c78643afc41690c9e119999d79d264665df9690113a46787409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5124 bytes
font_01_sfnt_off00007fed.bin
e62aa1d449eed64e8017f17c8e5ca3fa0893be0c3eb9bf121bd94d77933af181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 11124 bytes

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