Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda326c8097df368…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 01:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a11f8899ff0200e8dd10d950ded03956 SHA-1: 4c8baa9f8bdcdd349e4f048d3d7de23dc850f3bb SHA-256: bda326c8097df368fec4b4abb90839b1b39ac36ffde51a8eeba181fea79abcd2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, a technique often used to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=jeepers+creepers+part+1+full+movie'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to trick the user into clicking through to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jeepers+creepers+part+1+full+movie
    • http://zagenumez.lisaruth.net/uploads/1/3/1/0/131070588/eabc5cf75dc56.pdf
    • http://ssurll.com/10u6n2
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/81267699430.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/morino.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/79695714149.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/broadsheet_perth_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/best_annotate_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/bactries_anarobies_strictes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5708/files/27924158447.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/10189115193.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/high_mountain_rangers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/davis_drug_guide_discount_code.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/fuwizumedin.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/doxadivodalanowerofegaser.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_off0000808c.bin
0af6dfd2e7fdb2bc78a54938322a8489e03237d2c546b7ad8ae088f699f07681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808C 5264 bytes
font_01_sfnt_off0000926b.bin
512efd8c1aaf7102fa09a7d339c521b2efa1946b323b76ee14fb3bd95336a5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 10268 bytes

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