Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79489b5ea0d6700…

MALICIOUS

PDF

44.4 KB Created: 2020-08-24 05:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 962b1148a914f6e7ebe4ab4f279ce3e8 SHA-1: e85a6831ce1b3a79ce3a1e55008be45bdbe441cd SHA-256: a79489b5ea0d67008ddd965d95f0c739df7a678f4856ee6b667e728cf31417f7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/pify?keyword=free++vpn+crack+apk`. The document body, though heavily obfuscated, also contains this URL and references to "free vpn crack apk", reinforcing the lure. The presence of numerous PDF links suggests a link farm or a mechanism for distributing further malicious content.

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.com/pify?keyword=free++vpn+crack+apk
    • http://files.gospeltrumpet.net/uploads/1/3/1/3/131384573/2807409.pdf
    • http://files.terryrich.co.uk/uploads/1/3/1/3/131383456/lixozobikev.pdf
    • http://files.nwctahosa.org/uploads/1/3/0/7/130738554/be5b6472099c.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/nidanigar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/21354243597.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/java_jdk_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/8033/3989/files/batch_file_programming_hacker_style.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/allen_jee_advanced_test_series.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/dibeganofivamusup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/90934605262.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/10th_standard_tamil_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/folezarelajakupufux.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_off000070f1.bin
c01b6bcb44e1eedebfbad0345fc87aefd698a2e6b238a39d63af8613493e4050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 4796 bytes
font_01_sfnt_off0000815a.bin
79a950e47e7f93bdfffb6eda54da985d459f133c3c65c1de3fd527ae9506297a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815A 10444 bytes

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