Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0dbb76580e85ce…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 02:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abdcc79c69516835dad018e45d4af164 SHA-1: 4de7d51ffbe1b26de7e7ced2a7f4634bcbb1a8eb SHA-256: 3d0dbb76580e85ce7fb92b59790eeda8fe1a01fbca02bb5de85d330d2c1d9546
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One prominent link, 'https://ttraff.com/pify?keyword=english+worksheets+for+grade+6+online', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'English worksheets for grade 6 online', suggesting a lure to disguise the malicious intent. The presence of numerous external links and the identified malicious redirector indicate a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure.

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=english+worksheets+for+grade+6+online
    • http://fokem.drdavidshallenberger.com/uploads/1/3/1/3/131398140/lerugosinax-sakikesite.pdf
    • http://files.tlcgardensandcrafts.com/uploads/1/3/1/8/131871494/savirudirezazazani.pdf
    • http://files.helenkaufmann.com/uploads/1/3/1/4/131406369/migezuvib_zenutibulawet_bodorem.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/jumon.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/livoripo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/ryobi_18v_weed_eater.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/5209618967.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/capitalism_and_freedom_friedman.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/57943148379.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/16665289693.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/59263273642.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/38262752199.pdf
    • https://cdn.shopify.com/s/files/1/0450/2352/7070/files/how_to_download_viewer_in_jio_phone.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/11486257049.pdf
    • https://cdn.shopify.com/s/files/1/0444/3848/7206/files/all_decenders_seeds.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_off00005ff3.bin
c61c1414c39af565661241fee6ee0d4f94c28583d1f039155e724a89885ec0dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 5436 bytes
font_01_sfnt_off0000727a.bin
76d8aecdb04a64a573fc4d63a6c0136581cccad16d30c22f479c8d64f8e00601
pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 10328 bytes