Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c5bfc3e43f869b…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 02:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ac824a6b0594d29a976e3a793229b6 SHA-1: d7f81fba3fd5cc4d28c36f34528bd8a7ec14bc1d SHA-256: 48c5bfc3e43f869b9dabb3a3545741cc084c205b0fc7ebf22ceb6741a745f780
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking the malicious link. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, reinforcing the attack pattern. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=list+of+accusative+verbs+pdf
    • http://files.shacfreo.com/uploads/1/3/1/3/131380126/941ba56986ca8d.pdf
    • http://files.cbsamet.com/uploads/1/3/1/4/131483053/sirere.pdf
    • http://files.davidwbolton.com/uploads/1/3/2/6/132681783/pevapotiwevinez-kuwete-paxirixove.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/ronivajutetikukinomorapas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/kalender_2020_nrw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/mamemezugodazireseluj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/60239979816.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/wirazebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/magujujinawama.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/bonevije.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/51183203957.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/vutaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/aachar_sanhita_in_rajasthan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/naxuwamuvolaxotegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/87407198686.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/satafer.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_off000068d8.bin
8c1d5e63e2f9f60a7fc24e4e0f73663e0dbe1cc212c360b3e9a3f6ce2706f1d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5256 bytes
font_01_sfnt_off00007ac4.bin
52f73573bae9abc812bd643b3ecc119a7bf1348252bea394e454d1601bb8346a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC4 11060 bytes
font_02_sfnt_off00009ee3.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE3 16312 bytes