Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a699ce545a26fb3…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 13:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94d935ea6da42bcb85e0d8763675d4bc SHA-1: e1d8ddd0c406fe86c6589135f82e2d0ecc19f044 SHA-256: 6a699ce545a26fb382d0a2a4e1050fb6fb8f47d28152a64a252b2e1655d75c97
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for free software. The presence of numerous Shopify links, while mostly benign, is part of a link farm strategy. The ML classifier strongly indicates maliciousness, and the overall pattern suggests a phishing attempt to redirect users to malicious sites.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=extractor+free++for+windows+10
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0455/4637/3285/files/applied_bayesian_statistics_with_r.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/jojemutojilitit.pdf
    • https://cdn.shopify.com/s/files/1/0439/2157/2008/files/basic_concepts_of_economics_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/brushless_alternator_construction.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/water_pollution_in_marathi_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77650869017.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/bertolt_brecht_vita_di_galileo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/29475273969.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/la_reina_margot_alejandro_dumas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/71516237895.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/quadratic_spline_interpolation_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/nikedefiwi.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_off00005fee.bin
1c599e9b93299351860b544edd5bf0982325885494d0a6fd281bfd207f74f15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 5296 bytes
font_01_sfnt_off00007217.bin
7cf0e070f1edc5b627332a59c27a21bcfaf7a0321fd873aed61a515effa96eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 10412 bytes

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