Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08b6b8edfe530c8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-20 10:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da66462217348b526b3343de51f5de0 SHA-1: 8bfad3e3b711c9444f4b6ffaa31681dc3c9c1f0e SHA-256: b08b6b8edfe530c88211f20327b30978b42ea103970633fd123be7ca72de4a61
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=solving+logarithmic+equations+practice+worksheet'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the redirector and the link farm strongly suggest a phishing or malware delivery attempt.

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.ru/pify?keyword=solving+logarithmic+equations+practice+worksheet
    • http://files.jangrunow.com/uploads/1/3/0/8/130814923/tadewapudiwoxi.pdf
    • http://baxulaluk.laurapiersonphotography.com/uploads/1/3/1/3/131380275/3871298.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/digital_electronics_mcq_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/53372734519.pdf
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/pawujapivamisexufapon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/20258221868.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/ruvogiwoxetu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3247/5798/files/tulip_calvinismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/wajabunugiwosagipimuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/3054390990.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/kajasuwapigibibituri.pdf
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/aflac_short_term_disability_form_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0440/7309/1222/files/28231090584.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c5.bin
d76ee34ccf1e26e0623603413a910924eb0e2ae5a4d1f88bec9f53858514cfd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5792 bytes
font_01_sfnt_off00007b64.bin
43574eb3e008a199b08a4a40c64f87d16b877ad9194e494339e7e1bad06fe8cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 9996 bytes
font_02_sfnt_off00009d4d.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4D 16060 bytes