Malicious PDF — malware analysis report

Static analysis result for SHA-256 989bc48f2be8f4d3…

MALICIOUS

PDF

48.7 KB Created: 2020-08-05 00:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5163e804804ceee9133e1c216049ee4f SHA-1: 432dd6781adf6346b6a23293b5aaffe80ddf9444 SHA-256: 989bc48f2be8f4d381c9568d00c0bf7c761bc537ecf04dd73c41b8b2203bb058
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=english+grammar+learning+in+tamil+pdf', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content through a link farm.

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.ru/pify?keyword=english+grammar+learning+in+tamil+pdf
    • http://files.nwenergy.co.uk/uploads/1/3/1/8/131856446/beb49bf2f057834.pdf
    • http://files.clothesforallweather.com/uploads/1/3/0/7/130776298/0bcde.pdf
    • http://files.spreadalittlemotivation.com/uploads/1/3/1/6/131606331/nudofug.pdf
    • http://files.eumckids.com/uploads/1/3/0/7/130738719/kerubu_mapowutat.pdf
    • http://files.phoenixtherise.com/uploads/1/3/1/3/131380480/sijoxabagorekur.pdf
    • https://cdn.shopify.com/s/files/1/0434/6226/2936/files/rejadogaxajafubidupeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/3169329589.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/95797155413.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/50820247245.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/rapepinifimu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/42365080085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/softwares_serial_keys.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/64592974490.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/93317041788.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/16717695476.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/71650053257.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/ropalowumevesi.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_off00005ad9.bin
82ad50eda3966ec6504cb3455acaa70c032c19ecb5692f9789ac8148181b9dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 5088 bytes
font_01_sfnt_off00006beb.bin
e5c84850984f894c67c2d346387b6d6e7cef8214fc2c22ed2b3e3da1661bc6a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEB 4456 bytes
font_02_sfnt_off00007af5.bin
c4404f3ccae12d407d706ef8888773e3e71cdf486a4b934a9459673c6ba1f224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 13420 bytes
font_03_sfnt_off0000a547.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA547 4324 bytes

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