Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b39058198176626…

MALICIOUS

PDF

120.6 KB Created: 2020-08-10 02:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9912312c4c5fe97f601b9ed57d983e45 SHA-1: 6750cf4509df84f3f681cff35de5f4df0584c7e5 SHA-256: 3b39058198176626df94b74075b59d760d4d785c26ae3d7e994a20417c50a52f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=sed+awk+tutorial+pdf`. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the same redirector URL and numerous other PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF with high confidence.

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.cc/pify?keyword=sed+awk+tutorial+pdf
    • http://muzokuka.phohawkphoto.com/uploads/1/3/0/8/130874359/gapamom.pdf
    • http://niposomuk.dj1luvent.com/uploads/1/3/0/8/130874493/1fc96407e.pdf
    • http://ronov.jagpunjabitv.com/uploads/1/3/0/8/130815009/gupubisem.pdf
    • http://files.saxappealpublishing.com/uploads/1/3/0/9/130969990/lijajolevorimor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/kumumunidudeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/gta_san_andreas_cheat_code_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8089/0008/files/mizalum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/gazologijopifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/the_bermuda_triangle_mystery_solved_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/32974963754.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/gesepawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3057/files/accounting_theory_research_regulation_and_accounting_practice.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/advertising_media_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0441/2293/1352/files/jifowerodefewaru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/dotonuwivawugawotobeva.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_off00018f51.bin
c9c3b74775c08797aa96c4edd1bca4bc785dcf0be298ae03011842bdd3506f98
pdf-font-stream PDF embedded font (sfnt) at offset 0x18F51 5116 bytes
font_01_sfnt_off0001a0e4.bin
5fddff736fdfc4ae0b30af300548dbd4bc0b23697d3f6d4077c409f668f5ff21
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0E4 16768 bytes