Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef798039931408f…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 01:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cfe7295e63f05703e1bf3f18e582d49 SHA-1: 84376cb61a7833ee5b42e7842ee4da948604574e SHA-256: 2ef798039931408f0815600d24a897f85af69cae797c44469e324daf41f1228b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.ru/pify?keyword=hbse+open+form+date, which is flagged as malicious. This suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact lure.

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.ru/pify?keyword=hbse+open+form+date
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/58357347598.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/demesenawuboxanodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/21896038896.pdf
    • https://cdn.shopify.com/s/files/1/0460/2514/6527/files/pafufufiputiperesemusu.pdf
    • https://static.usrfiles.com/ugd/6a7407_dc57f28ce0b14bcbb22733c7b4e0240b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c206f1c44d043f999a4bb4ab4a159e7.pdf
    • https://static.usrfiles.com/ugd/362633_af8a9c3366cb496d8c4608bd1902018f.pdf
    • https://static.usrfiles.com/ugd/696b8a_b87b3f854cb84afaa148f0327e0058de.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5b4b82739394ef4bb6a35ed2618f455.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8405a7a87514521a8b6e3a1fa891439.pdf
    • https://static.usrfiles.com/ugd/47b1e8_01f639386a704ad4aa8ae36a0f490850.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_off0000701c.bin
2c622e8ce09e5706c904244b5ac98681ce0f6342178b14c92ed754d608cc5328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 5256 bytes
font_01_sfnt_off000081d8.bin
674b9ad84aedb1cfb51e36ada989cbc46b430cef82b2ccf112357044285e7493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D8 10832 bytes

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