Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df9eafed9c70164…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 05:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d41c7f755be25da99ed947a1d43ec9 SHA-1: c3af397d46a487973c4bffe99dfe50fae9bbb34c SHA-256: 4df9eafed9c70164f5542dee2c95fa87cca51aaa98d44cb491d53422d7c87583
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'argumentative speech examples pdf' and includes the malicious URL. This suggests the document is designed to trick users into clicking the link, likely leading to further malicious content or downloads.

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=argumentative+speech+examples+pdf
    • http://files.lusialatuconsulting.com/uploads/1/3/1/1/131164009/7337104.pdf
    • http://files.centralfloridarowing.com/uploads/1/3/1/4/131437655/debodob-rupuvagarapi.pdf
    • http://files.axevmc.com/uploads/1/3/0/9/130969525/tafevogapowaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/xezepajogoruxemumuviwav.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/2004_jetta_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/jolafifivaxazila.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/31626090892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/87511010849.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/23706946139.pdf
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/tebagaxosiwesujitepipafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/bemaretakomivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/kumaxigix.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/goporapiberefupawaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/47969669342.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/59141358776.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/11101492344.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_off0000933a.bin
596a3fa20f1ec13d8c852c05e05207c0d7a0436e2519c89629aed2df83d0f7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933A 5684 bytes
font_01_sfnt_off0000a676.bin
2df2fceef37f8a034fbbd4b8dd47bf3ee53ee2960786122fe829222adbcae461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA676 10640 bytes

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