Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55e2a3eef27531f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 14:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7710533608cfbf7b424436475aabca30 SHA-1: 667eb9b1150393a545c2f719545238365dcea234 SHA-256: c55e2a3eef27531f8a19d427c5c2fee455f38458b0c9096f95eb385d18b25f47
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, identified as a link farm, with one URL pointing to known malicious redirector infrastructure. The document body is heavily obfuscated but contains the URL 'https://ttraff.ru/pify?keyword=sheep+head+minecraft'. The primary attack pattern involves luring users to malicious websites through these numerous links.

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=sheep+head+minecraft
    • http://files.comedykerfuffle.com/uploads/1/3/2/7/132740951/danagafovubo.pdf
    • http://files.geoffleavenworth.com/uploads/1/3/2/7/132710628/1371689.pdf
    • http://files.powdermonkeycayman.com/uploads/1/3/1/1/131164198/7033960.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/40767252389.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/xixekusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6933/files/72247384654.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/menupuvisapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/xuripenulowunavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/mowuputawajeterakurokew.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/78900329870.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/40040193250.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/29003051014.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/20254182686.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_off00005e4c.bin
f7229226fdba51988f2d3932f297cea1d9c73ed4aac42fd1192772f5dae7c4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 4964 bytes
font_01_sfnt_off00006efc.bin
57228f4817440781444f0b567caa25eb5c80536d83317634010fbd56a9dd96f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 9620 bytes
font_02_sfnt_off00008fbd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBD 4324 bytes

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