Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb064ac39d0c3cff…

MALICIOUS

PDF

46.7 KB Created: 2020-08-02 20:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f33bc80a4b5a38cac7daf317002e8c SHA-1: cfbf3cab9f18d23d077ca2a7ec05512ce8b57ede SHA-256: fb064ac39d0c3cff0d588cf601df69e00c02664cce30922d6f978f10fb8f567a
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 17 external PDF links, including a critical redirector link to ttraff.cc. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the redirector URL and several shopify.com URLs, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=an+ionic+bond+involves
    • http://files.truvuwindows.com/uploads/1/3/1/4/131453429/kuzigibepivizo-riwokavul-zapef-voluwagona.pdf
    • http://files.solekart.com/uploads/1/3/2/7/132712093/zudazezegosubu.pdf
    • http://files.townsendchemistry.org/uploads/1/3/0/8/130873718/4532037.pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/nelewovazewafabitusoradi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/7540745876.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/busiliwowopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/24475335702.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/63236404362.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/doll_dance_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/xalakot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/59904212891.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/92687134485.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/67794324642.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/15c_to_f.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_off00007b45.bin
727ac73f778128ee0d78c237d1adf6b5599d8e9c5975fae25e32b62a93b39cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B45 4816 bytes
font_01_sfnt_off00008bc1.bin
bb3639cfd415a8849adb1bed199179563a1e700032e6b95fa6aa48003a489f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 9992 bytes

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