Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fb559b63a33a25…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 15:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a7319bf05c633ff6ed08e91c64188b2 SHA-1: 269c92b63273d73e8208fe08f597ee361ff199f3 SHA-256: 21fb559b63a33a258165777f4b42a1a2863828917617c47b4616e278b8484274
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pneumopathie+d+inhalation+traitement+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf'. The document body, though heavily obfuscated, contains fragments that suggest urgency, aligning with the 'SE_URGENCY_LURE' heuristic. The primary attack vector appears to be social engineering via a malicious link within the PDF.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=pneumopathie+d+inhalation+traitement+pdf
    • http://files.logancountycore.com/uploads/1/3/1/3/131398117/2876669.pdf
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • http://files.marriedtotheauthor.com/uploads/1/3/1/4/131437161/zenojenefo.pdf
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://files.votejoe.info/uploads/1/3/1/4/131405977/jevurifutepixusanixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/can_a_chromebook_run_steam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/maladolescenza_1977_full_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/52660928690.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/xesoxepawetif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/24308134808.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/29063102236.pdf
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/timodetovog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/cs_go_default_config.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/fazinugebuwajusaganil.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_off00006393.bin
a62d5a9e5b917cc1a93997ca93ee15bff2c3217d8b86a2d96bf58261774d3c4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 5104 bytes
font_01_sfnt_off000074c2.bin
a84f9a0eb1023b17c4c79a3cbd66a8f5a801326b4379239f0770666d5381a060
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10264 bytes