Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabc2ade6ecd04ca…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 15:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a3f5c80d9c1eaa4a2ee5d9a93178df4 SHA-1: 3f32562a25e7ce4ec4e7bc46bf8d4696ba239a4e SHA-256: aabc2ade6ecd04ca8017d019a9430e23b40b1f80b4b53b0b61dcb0a5285d5208
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body and heuristics indicate a lure related to 'closed delinquent accounts' and 'payment', suggesting a phishing or scam attempt. The presence of a link farm further supports the malicious intent of driving traffic to potentially harmful sites. The primary malicious IOC is the redirector URL.

Heuristics 5

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=closed+delinquent+accounts+on+credit+report
    • https://static.usrfiles.com/ugd/f63f29_42f3428c5fdc4ff6be8eb496afa7b360.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d0322f946144df9bb4b7ac129bc082.pdf
    • https://static.usrfiles.com/ugd/b8c837_a973b37b504147cd9253f887e3dad7d3.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/34300563487.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/nenjodu_kalanthidu_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/antimicoticos_vademecum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/wepadabevis.pdf
    • https://cdn.shopify.com/s/files/1/0457/6644/3164/files/64581310547.pdf
    • https://static.usrfiles.com/ugd/b444d4_cd34d0c26fec400a814a2b7dc8526158.pdf
    • https://static.usrfiles.com/ugd/c068f8_796ac1571f98449aa00b580f4bb6b61c.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_off00006002.bin
6178173448b5c50d095dc018d9c4e9e9d993daf312830371556c4aecb41ab4a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5096 bytes
font_01_sfnt_off0000715e.bin
67391e4fd6243c696beae2bc9e0cd8ac0d4bc6505093aecc27aca2e19704dead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 10352 bytes

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