Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56dbdfaea5022eb…

MALICIOUS

PDF

34.0 KB Created: 2020-08-22 03:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80da3c8634d753e0c6f35d00898f0fbb SHA-1: 6124bf67abc868efe9dfafff48db89501d78b570 SHA-256: a56dbdfaea5022ebd4a80d11c1ab85610d64b20640f5744cb9ccf760b4d4a304
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to a 'Microsoft infrastructure planning and design guide', suggesting a lure. The file also contains a large number of external PDF links, many hosted on Shopify, indicating a link farm for SEO manipulation or to obscure the final malicious destination.

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=microsoft+infrastructure+planning+and+design+guide
    • http://files.juliemidkiff.com/uploads/1/3/1/8/131872021/kategunob_kixitoruju_xukufubenesujit.pdf
    • http://parexagag.nohsfamily.com/uploads/1/3/2/6/132681670/3522570.pdf
    • http://pawogogi.joychoice.net/uploads/1/3/1/0/131070109/sixemefunasoti.pdf
    • http://files.sovereignfoodie.com/uploads/1/3/0/9/130968968/jovetesezu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/54251973709.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/lozuzorapevatelolufiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/rinofojaxivozabowofaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/gesanujewoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/ralovojasipujitewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/80607063658.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/zunopikunanasinanodafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/85721497304.pdf
    • https://cdn.shopify.com/s/files/1/0432/1889/5010/files/google_chromecast_extension_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/matola.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_off000048bb.bin
7a4d2f09e2dd1081af2b452211f90a10b6f9087238eedd26e4b58e67976792ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48BB 5328 bytes
font_01_sfnt_off00005ae7.bin
cd68e3070247f4cc68129f4fe11d4c54dae1cf0d078d87003a535968302f275f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE7 9392 bytes

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