Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc30870d99e9cee2…

MALICIOUS

PDF

53.2 KB Created: 2020-08-14 03:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4420b3c062a2e50de586ea0d1c7d862c SHA-1: e818fb5a8d4656e74b1aa8031ab749928308c827 SHA-256: dc30870d99e9cee2cef40d36cdd82b88240c386cbfd342e02ca0b6cd2002eebe
128 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free lap harp sheet music for beginners', suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the redirection to malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to host further malicious content. The 'SE_INVOICE_LURE' heuristic further supports the idea of a deceptive document.

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.
  • 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=free+lap+harp+sheet+music+for+beginners
    • http://files.reyyofsunshine.com/uploads/1/3/2/3/132303172/kotezeto.pdf
    • http://files.allunaskin.com/uploads/1/3/2/6/132681992/vetudituno.pdf
    • http://xirepiga.barbaraschupack.com/uploads/1/3/2/6/132681579/43c44dfa8b.pdf
    • https://cdn.shopify.com/s/files/1/0429/3810/6023/files/xudojezutaxegolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/rovevinusufelukefutotep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/guvigigunejub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/72871357600.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4306/files/sanapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/78413211576.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/55247617792.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/rirukoxatedutalesitabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/81986086953.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/jetson_tx2_module_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/20914511714.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/noposugopowomeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/jidexivuteg.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_off00008f92.bin
dcd32ab3ccfff1b5ac8e60d1a3228063183f13152dfe8c9af2a18d100fa65c65
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 5524 bytes
font_01_sfnt_off0000a231.bin
83bb31d14f85c8c05b8d2566381430d752c388cd0f20970477030c465aa22c42
pdf-font-stream PDF embedded font (sfnt) at offset 0xA231 10976 bytes