Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a22685a651e343…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 07:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec6f5a4337fb08c74d6064c1262ebf87 SHA-1: 2183f018809f9028f13d5a439ad6597ce66e4ff7 SHA-256: e5a22685a651e343dfb31c08e3f1b014f13530f392e1de95aa0f954186e626a4
130 Risk Score

Malware Insights

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

The PDF file contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'manualidades para niños' and a call-to-action phrase, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting a malicious distribution or redirection scheme. The primary IOC is the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=manualidades+para+ni%25C3%25B1os+de+primaria+faciles
    • https://static.usrfiles.com/ugd/e3ed1f_01d95e37f56f437d8775d7404ec8b6f6.pdf
    • https://static.usrfiles.com/ugd/07625c_0bf70d03927b4f79876169114d6e740d.pdf
    • https://static.usrfiles.com/ugd/136d07_e3003d07c0f24f128d1eafba26e0aa1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9021e0a4d19a420d9e7f540be05bb835.pdf
    • https://static.usrfiles.com/ugd/b8c837_21a128bb8abd428692a50df8c46191c4.pdf
    • https://static.usrfiles.com/ugd/c1de29_e1c141415ad34d22b6f99a4647adc064.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea269253c2b649f3b3d778e6f3eb3586.pdf
    • https://static.usrfiles.com/ugd/b8c837_28659cd01f1f4b75b434e49e3ee1b8be.pdf
    • https://static.usrfiles.com/ugd/b8c837_43692c2d4ef04a4b87c6244a3a50b39d.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_835926d3f93a40628035b527b412b540.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_7813e1b478b24e8da97f398bcde350fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c39ae288aa48338b4977a89dcd2e02.pdf
    • https://static.usrfiles.com/ugd/dd4472_b21a2f5a1b16485cb938525673170cf4.pdf
    • https://static.usrfiles.com/ugd/09c3c7_ef591b85ecca40d08fbe26f4196e5cda.pdf
    • https://static.usrfiles.com/ugd/4d6844_b4a917346d044393baa188d373334521.pdf
    • https://static.usrfiles.com/ugd/b8c837_65257470cdfa4353843b286775c9c074.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e70ac7081e4bd6b0dd057354b0faff.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_off000070eb.bin
0899434778cabcdd0450ee61e392dd44c2aee75807ce624d50c6a48229bede80
pdf-font-stream PDF embedded font (sfnt) at offset 0x70EB 5520 bytes
font_01_sfnt_off00008355.bin
3df67c5580f215a4f4160d049eb430ad54e8ad4f4316e1b197699e2fca8332fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8355 14772 bytes