Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d47f532359ce15…

MALICIOUS

PDF

40.9 KB Created: 2020-09-11 04:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021aa5728784f2735a97ef3a02b43692 SHA-1: 5efcfc05832069efaf42b467cd60a4e3c8512ec2 SHA-256: 46d47f532359ce1573022a030abff7784c1792ba51c89fbdd2e6f61d806ec4d8
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Baidu news android app' and the URLs themselves suggest a lure to download an application. The primary malicious URL is a redirector, indicating a likely phishing or malware distribution attempt.

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.link/wix?keyword=baidu+news+android+app
    • http://sebexijob.elegantillusionsphotography.com/uploads/1/3/1/4/131407552/labesafewomubo.pdf
    • http://files.musicianpierre.us/uploads/1/3/2/6/132696174/cd9d821b55a903.pdf
    • http://tezofazag.opalfund.org/uploads/1/3/1/3/131379833/kuzobife_rojoganuto.pdf
    • http://files.aib-uki.org/uploads/1/3/0/8/130814283/lalitav_sovov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/71029945093.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/reveti.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/82958515655.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/xurarad.pdf
    • https://static.usrfiles.com/ugd/dbad32_c6dc968fae95403ba12525b4a22ea660.pdf
    • https://static.usrfiles.com/ugd/0a51c1_e03cd92246634d18be14347e1bcda267.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_off0000640e.bin
fd3769a3e8d88b7ea9d4340b0e74c04f7474f7a43e92a273f16ea863e1098448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 5064 bytes
font_01_sfnt_off00007568.bin
304369e3a098caca57e2e09f4d2f2e2de45da5814152aa549c6b3a1314f18d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 10008 bytes

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