Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c213611c5a933e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 19:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651eb86c4be8ed8a424615c8e54744a8 SHA-1: a37612cc9dfc54385e4df525f79bc3acb2bbac14 SHA-256: a4c213611c5a933e5ec8d910ce62a53ddd4d1608c8a9f6507817f69cf228a5ca
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented as a link to an English grammar PDF, but it redirects to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host malicious content.

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/pify?keyword=english+grammar+basic+rules+pdf
    • http://files.hooverdamnotes.com/uploads/1/3/0/7/130739146/6219677.pdf
    • http://guparu.creativeartsoasis.com/uploads/1/3/0/9/130969754/sifovig.pdf
    • http://files.aimeeswenson.net/uploads/1/3/1/8/131871705/9669054.pdf
    • http://potezalu.fifecarerscentre.org/uploads/1/3/2/6/132681647/xuguwogezuv-furad-buzenixanin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/pomajep.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/22433193693.pdf
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/9674590730.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/81552338489.pdf
    • https://cdn.shopify.com/s/files/1/0446/7779/1897/files/john_deere_hydro_185_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/download_bnf_75.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/xilirasodonisogid.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/4587368966.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/15138940828.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/3117137520.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/dawn_of_war_dark_crusade_mods.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/tigogixoneb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/xamamafepumawemomakugadi.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_off00006b35.bin
c2a52e44cab47a1363a5672b9b2ec91f5c7edf569450924d0230fb97946cf6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 5668 bytes
font_01_sfnt_off00007e51.bin
272464a3833eb35b2f1cf431a31fd07fdee6a83433860d000dc38c0dd8bbe46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 10096 bytes

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