Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ba27aa9eb8ebd5…

MALICIOUS

PDF

52.6 KB Created: 2020-08-13 22:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ab3597a26eb4e78f7c590249df5b585 SHA-1: f71b54aec9ef9779af7da16afc845132742a0a68 SHA-256: 21ba27aa9eb8ebd5d1bce3dedf73ffb477308a8c794503e3b24725de44f4b6ad
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a social engineering tactic to trick users into clicking the malicious link under the guise of a 'parents guide'. The file itself is generated by wkhtmltopdf, indicating it's likely a crafted document rather than a legitimate one. No scripts were extracted, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=5+feet+apart+parents+guide
    • http://files.100firesmoto.com/uploads/1/3/1/4/131438667/1379083.pdf
    • http://files.handhealth.online/uploads/1/3/1/4/131483371/59174.pdf
    • http://files.richardskrishnan.com/uploads/1/3/1/4/131437770/40cdcc155816e.pdf
    • http://files.drumbodentiles.com/uploads/1/3/0/8/130814605/506cb2d85147b52.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/saxon_algebra_1_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/niraza.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/wajufajajusan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/83710906391.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/29738701475.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/99986807471.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/70468710441.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/87482019767.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/nozobotivepazatabag.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/79380768977.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/98293614706.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/baponokadejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/zirokobulepizimigutu.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_off00008df3.bin
de5a191edbd99f17a147a5002c9408cbc6fa0fc81dd39f121d38d42d1d719f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF3 5204 bytes
font_01_sfnt_off00009fa8.bin
76f71ac51dc5aa20f816dab31f214db91ff3ea94ba04e836e01d8d66f603ed97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA8 11072 bytes

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