Malicious PDF — malware analysis report

Static analysis result for SHA-256 59992df13e1e8414…

MALICIOUS

PDF

53.3 KB Created: 2020-08-13 21:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3566a6b5feee2593b623e9c2fc14ff SHA-1: eb3f1b515e9d50f01ea62ef76e5ffc37390167ac SHA-256: 59992df13e1e8414331aa7d0fac22e7eae5e57cceced4a90a88b06a2967ac95f
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'International headache society guidelines'. This link points to 'https://ttraff.com/pify?keyword=international+headache+society+guidelines', which is a known malicious redirector. The PDF also functions as a link farm, with numerous embedded URLs pointing to various domains, likely for SEO manipulation or to host 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.com/pify?keyword=international+headache+society+guidelines
    • http://files.gardentogourmet.com.au/uploads/1/3/0/7/130775506/9466237.pdf
    • http://xerigure.bunnyandbearphotography.com/uploads/1/3/0/7/130775085/jozepobovi.pdf
    • http://files.sanskarsadan.com/uploads/1/3/1/1/131163718/4533803.pdf
    • http://files.crosskeysbarn.com/uploads/1/3/1/8/131856757/xirimisiguke.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/86348149949.pdf
    • https://cdn.shopify.com/s/files/1/0432/2879/0946/files/18574096306.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/fomorifofewavow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/bsc_first_year_organic_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/xewazopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/wenubeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/80346997972.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/email_extractor_1._7.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/antrenmanlarla_matematik_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/sofitel_brand_standards.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/87062355603.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/votazavaxiwimamuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/gowox.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_off00008ff7.bin
32c803908af6ff5ad5ec8af22984c6a8f46909b15c2276b0ed9152bcc0120e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF7 5240 bytes
font_01_sfnt_off0000a1b8.bin
e615ad1c5ee7cf0ddb35ee7be158f20518479472511f984a7976642810132b55
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B8 11168 bytes