Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acd8612fbd93373…

MALICIOUS

PDF

41.2 KB Created: 2020-08-16 16:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47de8e9d8cb6548715ccb7a6af0bf2f SHA-1: 91a53d83de2969c5f45ffcef616c5246817be555 SHA-256: 4acd8612fbd933737ba0c05e46e852b442a913052953901d97ddb85ea1a565ac
160 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and text related to 'Android backup similar to icloud', likely a lure. The presence of a password-protected archive lure heuristic indicates the attacker is attempting to bypass security controls by encrypting the actual payload. 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=android+backup+similar+to+icloud
    • http://kitif.savememagnets.com/uploads/1/3/2/3/132302780/rejal.pdf
    • http://zebitisal.m.wchqfm.com/uploads/1/3/2/3/132303382/vogar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8256/3232/files/tetelolube.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/17513073583.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/autodesk_inventor_2020_tutorial_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/narovuxivilavo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/gazominuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/selutabuzid.pdf
    • https://cdn.shopify.com/s/files/1/0438/4158/5314/files/rekotupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/xelowamapogare.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/william_shakespeare_sonnets_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/calculus_on_manifolds.pdf
    • https://cdn.shopify.com/s/files/1/0454/5331/2150/files/noguvavemazurilotajatuvab.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_off00006529.bin
bcd21be1323f4d7bd938135ec1ad46ac74d7e1fb1f3c54d0b8001d035bae248c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6529 5412 bytes
font_01_sfnt_off0000776d.bin
03461e6eaa8b96903ec9c0246dc0edb32de432dee5e78c11e700c823212bae38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776D 9540 bytes

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