Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a3dad50f20db2d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 16:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a88ee4de8e07d2bdf70e0a73814dfa SHA-1: c0fe8c6adec406f1472e18980fd71f75c27451a5 SHA-256: f0a3dad50f20db2da66015a34c6af5034bce21af3dbf6796b31fbb1e97d4a1f1
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results for 'ccna latest book pdf download'. The primary link, https://ttraff.ru/pify?keyword=ccna+latest+book+pdf+download, is a known malicious redirector. The document body, though heavily obfuscated, contains references to this lure and other URLs, indicating a social engineering attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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=ccna+latest+book+pdf+download
    • http://files.mysustainabletransportation.com/uploads/1/3/1/3/131398125/xemubadobesijukeka.pdf
    • http://files.emilioparrilla.com/uploads/1/3/1/8/131856277/67b6d72479.pdf
    • http://files.blacksheepstrong.com/uploads/1/3/1/4/131409244/nifeduvovo-vozejunez-fonafewosegep-ninotudet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/sefanux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/67554318761.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/kaxujelijivaxuzitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3571/files/64692916161.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/96870524097.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/31358179646.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/marital_counselling_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/mijekon.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_off00006130.bin
f391748b0a791589ead4e86883832880a13232ca42f7e8a2fbae0549198018a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 5252 bytes
font_01_sfnt_off00007331.bin
7cbc02f26801bd50ca8025c66acb9d5d0e5f05a349397c2cb88148535147fa23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 9972 bytes

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