Malicious PDF — malware analysis report

Static analysis result for SHA-256 da168e1d6eb29c3d…

MALICIOUS

PDF

45.6 KB Created: 2020-07-26 13:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764eec9833e01336023fdd833fd1d75c SHA-1: 47927cdf84d00ee1446acb9666c6069076bcfca0 SHA-256: da168e1d6eb29c3d4a345fad4b4c342ac53332e03f94231bc582a822b7cc298f
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 PDF link farm. One of the primary links points to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to 'guided reading level l series books', suggesting a lure to attract users interested in educational content. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=guided+reading+level+l+series+books
    • http://files.stcatherineneasden.com/uploads/1/3/0/7/130776273/poritemizazafota.pdf
    • http://files.lindastantonart.com/uploads/1/3/0/9/130969834/nolejawesit.pdf
    • http://files.premierbridalshows.com/uploads/1/3/0/7/130739456/bf7f06.pdf
    • http://files.bluebirdupcycledstyle.ca/uploads/1/3/1/4/131407045/1154738.pdf
    • http://files.premierbridalshows.com/uploads/1/3/0/7/130
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/fizepopusufujavewafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/gilelut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/45437289267.pdf
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/tanejifanivobitegevinut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/nemajujosubiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/15557246336.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/55385186752.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/rerowokugizunokedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/bepijoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/50751224949.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/2145158092.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/16831475853.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/zapagewobob.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/83573411385.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_off00007492.bin
e98b5c423f9409887db3de4fff4d4cbb812ddfa24b08c977ba3b0789b88d0c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7492 5088 bytes
font_01_sfnt_off000085e6.bin
7a165ec986d1d641da67ebd9f89a82a3321de0c47f8aebea74b0df6b01a94bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E6 10316 bytes

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