Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec50fe65ebe865df…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 13:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e79d1c476a547517b3f577e39eba79ab SHA-1: d6693e07f8331d1ae77278805eae4ed4279329a9 SHA-256: ec50fe65ebe865df239318d8452f36cc0fddf20ddf89179f78b41111e1bbd4c6
130 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=fwisd+focus+report+card'. The document body, though heavily obfuscated, contains what appears to be a lure related to a 'report card' and mentions urgency, aligning with common phishing tactics. The presence of numerous PDF links, many hosted on Shopify and static.usrfiles.com, suggests a link farm designed to obscure the ultimate destination.

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/wix?keyword=fwisd+focus+report+card
    • https://cdn.shopify.com/s/files/1/0440/4353/4486/files/cranial_bones_labeling_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/zesosiwir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/ladumususaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/analysis_of_variance_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://static.usrfiles.com/ugd/5926b4_9ffb4dfdced64c8ca61cafb7d01b8ac4.pdf
    • https://static.usrfiles.com/ugd/b8c837_6107227752f744bc9b6093a3d5bc7f42.pdf
    • https://static.usrfiles.com/ugd/d4da64_5039a6984dbf4771a3a83229f88b04b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2d3ad00f82e41b29ca32be804017d62.pdf
    • https://static.usrfiles.com/ugd/bf07b1_725086f1af6147a3b88cb355d525a4d9.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_off000057f4.bin
77473b88f89b98c6593c7da4290f30bdb9e7bfb93edc16116502aeb8436291e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F4 4940 bytes
font_01_sfnt_off000068e3.bin
f11e3e09210c8e38b0c233147cff67bd0f5c858bc6f119f8a9159f0ee470e279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 10596 bytes
font_02_sfnt_off00008d1a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 4324 bytes

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