Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa7cc5e92adee0d…

MALICIOUS

PDF

62.5 KB Created: 2020-09-01 01:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 831972b3551b722e1d55b010a9209a25 SHA-1: 5dae733f23fed2059745bbcc869e13634884c5fc SHA-256: aaa7cc5e92adee0d7b9c27185729831a13bb22ca27e030fead869cef19442a99
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though partially corrupted, includes the text 'Lung empyema guidelines' and a URL that matches the redirector, suggesting a lure to a malicious site. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, further supporting the attack pattern of directing users to potentially harmful content.

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.com/wix?keyword=lung+empyema+guidelines
    • https://cdn.shopify.com/s/files/1/0435/9867/6131/files/77956282012.pdf
    • https://cdn.shopify.com/s/files/1/0449/8879/2990/files/banking_companies_act.pdf
    • https://cdn.shopify.com/s/files/1/0431/7138/1405/files/67692728116.pdf
    • https://static.usrfiles.com/ugd/b8c837_139a9c5d3b4441b29ca999ea5cdc596e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://static.usrfiles.com/ugd/b8c837_39bf7b2487874174a36f653bbb01d6d8.pdf
    • https://static.usrfiles.com/ugd/f55bec_a360486252844066b5defe86141e58b2.pdf
    • https://static.usrfiles.com/ugd/5b604d_6e84a2440e4f43e8b9c74a56e719be2f.pdf
    • https://cdn.shopify.com/s/files/1/0465/3540/9814/files/nesokagepagasizepak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/56840155939.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/65961377230.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/windows_10_os_for_android_phone.pdf
    • https://static.usrfiles.com/ugd/0779a3_737ddaba181a44a285ecce3bc2fa96b3.pdf
    • https://static.usrfiles.com/ugd/9c43ec_4cdfdb48485b40d2aca518ed267ef204.pdf
    • https://static.usrfiles.com/ugd/217d68_b7be0c5d72c34abab61cbf755232b283.pdf
    • https://static.usrfiles.com/ugd/0c268c_b05e749a69bf44d89a7895370cc96f7d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009666.bin
0c1485c0edfe7f7d724b0631b54ac86ce368b2f0bcb681a7288305ca315cff58
pdf-font-stream PDF embedded font (sfnt) at offset 0x9666 5228 bytes
font_01_sfnt_off0000a82c.bin
0b3ed14cc4d34a3b9f58a54576688d73554f64472be4e48c86cc0f8220e12056
pdf-font-stream PDF embedded font (sfnt) at offset 0xA82C 15148 bytes
font_02_sfnt_off0000d771.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648
pdf-font-stream PDF embedded font (sfnt) at offset 0xD771 16148 bytes