Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2436076e149dd6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 00:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5314b8f13b17338d022886c854deff93 SHA-1: e912d0687b2d34965fd73a271b74253725947dba SHA-256: eb2436076e149dd620314cedc334dacd13b9f6e4b50daf1b4a3542e3aa952a43
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=antonyms+worksheet+pdf+grade+3'. This URL is presented within the document body, disguised as an educational resource. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the true malicious destination. The primary malicious IOC is the redirector URL.

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=antonyms+worksheet+pdf+grade+3
    • http://files.johnvcatania.com/uploads/1/3/0/9/130969260/c987588.pdf
    • http://files.vampbeautystylist.com/uploads/1/3/1/4/131437380/0057de35f583e.pdf
    • http://files.hutchleatherworks.com/uploads/1/3/1/4/131406717/2819748.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/8890518047.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/vinufikax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/tubinev.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/93903018232.pdf
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/doroviwesag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/save_linkedin_profile_as.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/24817491815.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/43872610053.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/nuzanazomitogujomunip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/xonas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/23372093435.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066fa.bin
eb157fcc6de3db23dda261415626cbc49e70258f1057ecd8593fa995ae35fec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 5832 bytes
font_01_sfnt_off00007ad3.bin
11e2ac8f038b213171eca3afc8e9de9728fceebc07dda5ee0ca2769b4971cac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD3 10568 bytes

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