Malicious PDF — malware analysis report

Static analysis result for SHA-256 375ec6e9cbf454ed…

MALICIOUS

PDF

39.1 KB Created: 2020-08-23 07:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b91cdeaebb071bfe82083f5521831bd SHA-1: 3bb5269d2c58f332c95833f5261cb5479da8ccb1 SHA-256: 375ec6e9cbf454ed7b61793aae789879abcdbbdec51fa39a61928b0cb57b39a4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'free printable coloring bookmarks pdf' and embeds multiple URLs, including a known malicious redirector. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, likely for SEO manipulation or to obscure malicious destinations. 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=free+printable+coloring+bookmarks+pdf
    • http://lirofi.dianebattistello.com/uploads/1/3/2/6/132696021/wukiweje.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/xureguziva.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/waving_hand_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/4339597497.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/49430943734.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/mibixomunezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/guitar_chords_book_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/comment_fusionner_deux_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/dikupukiruda.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/poulan_wild_thing_2375_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/lunatoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/mijuvozun.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/46960028468.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_off00005775.bin
40c13bbe9a5eba01663d217e086c9af40aa2ed8b00d53141e7bfacbea87a3268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5775 5636 bytes
font_01_sfnt_off00006a78.bin
a6a1e60de5f13baacb92cfbbfe66ef2ca7f2eca12d8d24a2b0b5f1265d730571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A78 11508 bytes

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