Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e18843bb3a3764f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-14 19:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89f63c66540bc856d55d3b48166bb9b2 SHA-1: 6966a4ee818a9c2d2418451bf3fa07845f0de182 SHA-256: 4e18843bb3a3764f0e8342626fe04a8ca540ce6460c9bf12c9f5f0021bfb6aaa
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the malicious redirector and several other URLs, including one hosted on 'kefaten.cjtendermeat.com'. This suggests a link farm or SEO poisoning technique to distribute malicious content, likely a downloader or exploit. The primary intent appears to be redirecting the user to malicious infrastructure.

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/wb?keyword=centripetal%20force%20and%20acceleration%20worksheet%20#2%20answer%20key
    • http://kefaten.cjtendermeat.com/uploads/1/3/2/6/132696158/4546330.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/18301408129.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8827/files/godekezikurogigar.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/wekefilixojizepekogafiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/todebevenexelesenusuxipos.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/perireja.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/93872783007.pdf
    • https://cdn.shopify.com/s/files/1/0438/9647/1707/files/28480917320.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/wexinodaxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/five_metaphysical_poets.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/arteritis_de_takayasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7370/6913/files/wosamixogulakorisupevepim.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/wudafetaluzoweta.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/2028131001.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3e.bin
9ebccacc30ec6480a22a409f82e56d61f1aaf4bed863fea8750a3efaefa528f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3E 4484 bytes
font_01_sfnt_off00006cd2.bin
27cdf869fca61a35be38d468b2e92341ffb3edac6f850dedae7430cdd7bb71c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 5304 bytes
font_02_sfnt_off00007edd.bin
a19ffcef0fe15127ab56524ec7defb1d863cb3da206102e0e65a403a096e1610
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDD 9816 bytes
font_03_sfnt_off0000a065.bin
5620f15d50b29f247ab50ad9cec820e4c7fb27fb9af43dcd2470e09765f34b3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA065 16180 bytes