Malicious PDF — malware analysis report

Static analysis result for SHA-256 399908ecd3a4b34a…

MALICIOUS

PDF

35.5 KB Created: 2020-08-08 05:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f52dbf466d4252fc752ca95caaab7be SHA-1: eda9cebda41c0cc1d99450b55f8c47c615e2d313 SHA-256: 399908ecd3a4b34aa653481ade025b0bc7cf448ef440a41f37f50cea388f6532
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. The file is classified as a malicious redirector due to the presence of these 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.cc/pify?keyword=opposite+words+in+english+for+class+1+worksheets+pdf
    • http://files.nativetwiststudio.com/uploads/1/3/1/3/131384468/buxikewi.pdf
    • http://files.diaryofacancerresearcher.com/uploads/1/3/0/7/130739322/zogofugal.pdf
    • http://files.ameridragonsports.com/uploads/1/3/1/0/131070938/76089.pdf
    • http://files.constitutiondaycentre.org/uploads/1/3/2/8/132814146/duwuxok.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/20971079069.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/mopig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/27039554217.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/vazuderuturat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/82676542268.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/kixananutefix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/how_to_reinstall_graphics_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/zibamajewozowejilibasidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/pyaar_ke_side_effects.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/45759368015.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/59633565933.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/99413027910.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/limepu.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_off00004c09.bin
b5c52a9514e16359997aea3099dc63abf1786bd739c653cf24dd5548578c8d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C09 5652 bytes
font_01_sfnt_off00005f50.bin
4d8b6394e18c5a1e6767833122cda09e4e7c3102b60cfbca2af1cc90d014e0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 9948 bytes

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