Malicious PDF — malware analysis report

Static analysis result for SHA-256 a753ea65d96a61e8…

MALICIOUS

PDF

56.9 KB Created: 2020-08-24 19:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc988ee92484cc456bbccbacd95319d8 SHA-1: db14e8427bd430f14b9ca48d75ce9307e79f6d3a SHA-256: a753ea65d96a61e8ec726760ef736b8dd80f8a44469b48673ff25e9ef4d920c6
160 Risk Score

Malware Insights

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

The PDF contains a link farm with 20 external PDF links, many hosted on cdn.shopify.com, and one critical redirector link to ttraff.ru. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=australian+diabetic+retinopathy+guidelines', suggesting a lure to a malicious site. The presence of a visible LOLBin command execution instruction further indicates malicious intent, likely to download and execute a second-stage payload.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.ru/pify?keyword=australian+diabetic+retinopathy+guidelines
    • http://files.lesliescakeroom.com/uploads/1/3/1/4/131438844/2253818.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/rancho_cucamonga_weather_hourly.pdf
    • https://cdn.shopify.com/s/files/1/0436/8387/2921/files/lufijoforoziwisuluxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/dijupixijukonigofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/44082796695.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/kofapimofumunapeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/zokegafiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/curl_set_header.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/66488264169.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/sadogimuxabi.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_off00009fd7.bin
76d5cbf6a55c654b29db1043ec280a11f4295760cc3a108e52d73d6fffd8ba5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD7 5564 bytes
font_01_sfnt_off0000b2b8.bin
5eb66923813b9d46b61ed2dafc5f7600377ea19df2ff4b7ca874e4d81c8fd2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B8 10524 bytes

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