Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a3c2d32fd1e760…

MALICIOUS

PDF

47.9 KB Created: 2020-08-09 18:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3fca6db4b0e32c25d7c890d2ba706a1 SHA-1: 10d438d679b1e510d1ef74da668573e6ceba0aed SHA-256: 35a3c2d32fd1e76077c497b9a2b54d8a11b58698f9c3c0320060da5f4cb942b6
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL, 'https://ttraff.ru/pify?keyword=icsi+handbook+on+mergers+amalgamations+and+takeovers+pdf', is designed to lure users into downloading further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=icsi+handbook+on+mergers+amalgamations+and+takeovers+pdf
    • http://files.herbssupply.com/uploads/1/3/0/7/130775200/mekivukopatar-sazufexi-rewarofubup.pdf
    • http://files.mentalhealthhelpforyou.org/uploads/1/3/1/8/131856050/09bc883913.pdf
    • http://files.bbbbstore.com/uploads/1/3/1/4/131483830/7788580.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/toloke.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/medical_work_experience_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/45659446635.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/discrete_structures_logic_and_computability.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/72060748859.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/dekelanapuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/53429039075.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/mofijidexulutotivomiwava.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.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_off00006cf9.bin
73ccab75f838039d9e7c6480c1bf0dfcb2da086b3ecf40fc8fe822ef75f50dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 5560 bytes
font_01_sfnt_off00007f9f.bin
08ef200fe64ce114fb5054ed4285a9e18327047244b81261fd90bb65fadb3778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9F 10660 bytes
font_02_sfnt_off0000a404.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA404 4324 bytes

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