Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb846506cc514178…

MALICIOUS

PDF

48.3 KB Created: 2020-07-31 12:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1259724c975a45cffdda8c50f3dc8107 SHA-1: cb50cca843cfe3baed49944809b694a7a122ced5 SHA-256: eb846506cc5141783c80ba5bf463de9a36d1d7cde8a50ead80d230c3db1e2b4f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.com'. Another heuristic indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. The document body, though heavily obfuscated, contains text related to 'Vcf to pdf conversion', aligning with the lure used in the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=vcf+to+pdf+conversion
    • http://files.interiormotivesconsignment.com/uploads/1/3/1/4/131453188/lowowumi-lotijijix.pdf
    • http://files.runningtheory.org/uploads/1/3/0/9/130969543/xevutarikuzilox.pdf
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://files.uottawaequestrian.com/uploads/1/3/2/7/132712315/e44fd62c.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/taxajapujoxawosaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/15563060521.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/53330500898.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/53078113072.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/75905164962.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/jolekejavuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/23453207144.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/14138780119.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/vupili.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/pevowoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/jilowatakaroguwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/surasabixogul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/vekalofebiki.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/3070310859.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fd9.bin
b938082fe2ad17d6eaea112e33434fbe1ef76dc821cfcaf97d5d624eee8f1712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD9 4720 bytes
font_01_sfnt_off00008ff7.bin
1ecc55e54d8a1abb056d1c0d7c56eab2bc6f1fea9296a817b59759e8c3ea1ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF7 10524 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.