Malicious PDF — malware analysis report

Static analysis result for SHA-256 119fd7b1e75d5a9b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-15 22:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3cf1edb28f61201da7b50245b68ee5f SHA-1: 52f5bf4825d28212e445d596ecd6f76a5f58f765 SHA-256: 119fd7b1e75d5a9b9b456474f1924af25999ed634d8df1d073e970630fcb499f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting it's designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/pify?keyword=big+little+farm+hack+mod+apk", which is also flagged by heuristics as a malicious redirector. The presence of numerous PDF links indicates a potential attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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=big+little+farm+hack+mod+apk
    • http://goridet.wellspring-contemporary-art.com/uploads/1/3/1/3/131381369/189af.pdf
    • http://files.mushtaraka.net/uploads/1/3/0/8/130874543/9778658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/15787397244.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/matplotlib_bar_plot.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/kilabad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/35192282950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/23972139116.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/vijusut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/donazijikegabazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/22552987853.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/medical_tourism_questionnaire.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da3.bin
af0e6f26b2f88a71f471a6a08856b8cdce80285eba9b2e58a628e22f2ad96a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 5504 bytes
font_01_sfnt_off00007032.bin
8ae204fca55c2698f934658af071c36a8311c64d6b990b549d1cc85fbfff9987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7032 10136 bytes
font_02_sfnt_off0000931a.bin
9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931A 16160 bytes

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