Malicious PDF — malware analysis report

Static analysis result for SHA-256 14be9276285a0d81…

MALICIOUS

PDF

43.2 KB Created: 2020-08-02 22:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa5ce505e54e34ed79894fe45d8139a SHA-1: 2712da99629a64beb1f01c048d618bcc90746a18 SHA-256: 14be9276285a0d81cb90365fe110a4a100733dabaf747fefa355bd74f3c0b6fa
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=save+twitter+gif'. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. No scripts were extracted, but the document structure and link farm suggest a phishing or scam attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=save+twitter+gif
    • http://files.mellamarministries.com/uploads/1/3/1/3/131383954/xemukaxenoti.pdf
    • http://files.missiontruespirit.org/uploads/1/3/1/4/131453588/2761847.pdf
    • http://files.designandpackaging.com/uploads/1/3/0/9/130969505/gitamarenid-jujovobo-zapeba-dewiwa.pdf
    • http://files.icdriversedge.com/uploads/1/3/1/3/131398164/1720343.pdf
    • http://files.raydickaty.com/uploads/1/3/1/4/131407539/9390444.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/varosalul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/xagobopubivexomimotofim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/volexesoxosiweloledixepip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/jusawepulumujowitabugugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/puxizeka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/john_deere_350_dozer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/dafakowomofodejowifejowuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/86915466927.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/54033803703.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/bodologuzufef.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_off00006bdc.bin
921de630f78a6ecc33cc9921fcb3cb2c587aec9dbc14f0575520a2190134283f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDC 4980 bytes
font_01_sfnt_off00007cf9.bin
52d3ea771747b71d62f8be0c570150a05358b49c008eac1b92307b0678f5a2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 10328 bytes

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