Malicious PDF — malware analysis report

Static analysis result for SHA-256 a392fb95afe52104…

MALICIOUS

PDF

35.2 KB Created: 2020-08-30 15:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97b0e233431847af3238aced6e2f52d SHA-1: ca3159d82824132bff1a540c15ad0b7b4720741d SHA-256: a392fb95afe52104519d36582adfa4083f0692c378e26d427da83ac419c4736e
90 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body displays a German message about a lost server connection, likely intended to trick the user into clicking the embedded malicious URL. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the family is unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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/wix?keyword=ark+wartende+verbindung+zum+server+verloren
    • https://static.usrfiles.com/ugd/d1c05f_aa25fd6422fa43c69deede78bb9b1237.pdf
    • https://static.usrfiles.com/ugd/cc03df_f1873b31afc24915b830741c89ca891a.pdf
    • https://static.usrfiles.com/ugd/1decf9_c11621a24456481fabcc19c7a0615f57.pdf
    • https://static.usrfiles.com/ugd/5438e3_34684da57f07465fba538befa7db47c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b379de2e3ad4784b77d7e57621d9fbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_62a7d0c0d7874b74b6a20286b1112f3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/68660018168.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/vadutigazu.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_off0000482a.bin
519371eb60d9740c6d4e86d0ec48fc697c7b112d92ff1ca1d2978686baa39698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482A 5540 bytes
font_01_sfnt_off00005b0c.bin
ea91d2f38c406ac9ab06be3445e711379fa14b137d69a47658120ab97bc31e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0C 10704 bytes

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