Malicious PDF — malware analysis report

Static analysis result for SHA-256 e199cfd047616978…

MALICIOUS

PDF

41.8 KB Created: 2020-09-16 20:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03819d74eaabf5e02451288753248f70 SHA-1: 1d06c048f7c94802b00bdf38cf704a9ba6e3ba27 SHA-256: e199cfd047616978532910374c37fe2e9be88a154b31ea159abc5372cf564892
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to a URL containing a search query for 'bloons tower defense 5 apk'. This suggests a lure to trick users into downloading potentially malicious software or visiting a phishing site. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other embedded links, many pointing to external PDF files, further supports the 'link farm' heuristic, indicating a coordinated effort to distribute malicious content.

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.com/wix?keyword=bloons+tower+defense+5+apk
    • http://milabigoz.kelseyroserocks.com/uploads/1/3/1/4/131437454/lubezepufak_xemopomovu_kuriwu.pdf
    • http://mubimixag.ketymae.com/uploads/1/3/1/4/131453027/538b5.pdf
    • http://files.mstreetfreerunning.com/uploads/1/3/2/6/132683135/wadud_kotijuxomobo_xavenefolutipi.pdf
    • https://06e89dc1-5b57-4e53-baf3-f74bb1a3b053.filesusr.com/ugd/a32c20_8b40c3c0f6474f31acfe57209aa9496d.pdf?index=true
    • https://df8a8fcd-04e2-4092-b42b-c664ada9f80a.filesusr.com/ugd/f2ef67_52b4ed0877c5427cae3c5ad2e374b3cc.pdf?index=true
    • https://ffdf500a-0edd-4152-a7ba-1dd489b5b662.filesusr.com/ugd/55e2c6_d69d564121374b0f9258c7d58f0c3940.pdf?index=true
    • https://907f91e9-c0e6-4224-b71f-e1002ee1a82c.filesusr.com/ugd/0182ef_332e31e31b7b48f39e49e7384bfd6e48.pdf?index=true
    • https://0b59de2a-76e2-4894-abae-337391778b04.filesusr.com/ugd/1a1092_4da4dcbfed484e2fbfd0ac38f6d973c2.pdf?index=true
    • https://f1e4f9da-aba3-4fbf-b094-ffa5037c6cac.filesusr.com/ugd/4fb05f_d89b6f3b99e74d09a3bc0ac812fa3247.pdf?index=true
    • https://48fc243a-2ff1-4d2b-a113-651809a72fee.filesusr.com/ugd/15ebe2_1b1f2ff40fd34916a7d07d9d263883ae.pdf?index=true
    • https://04cc92c7-3c84-4193-bd37-b4b208eef5aa.filesusr.com/ugd/3e87bf_2962507ec42e4f43b5ef9aeb3ce597a3.pdf?index=true
    • https://ee266eaf-422d-48dc-be6d-9ffd4744f7ad.filesusr.com/ugd/c57cae_8ae9156c61c94b8197a74a2b82f8d7df.pdf?index=true
    • https://a2c2e907-fff8-4692-9246-61f5063e3cf7.filesusr.com/ugd/2e4eb4_e7707bb15a1e4d58927af406e77e779a.pdf?index=true
    • https://6a649b27-b942-4f94-aa83-b4601f1139e4.filesusr.com/ugd/09c3c7_1cdb392ed3344c8fa199d6afb6eff540.pdf?index=true
    • https://5a5b7d38-7f0b-4e92-9ccd-076edc9e83c5.filesusr.com/ugd/ab922d_71409b324187461ea8ce5f0513b5ff04.pdf?index=true
    • https://235847af-367f-4307-95ec-087b91f47ca4.filesusr.com/ugd/33a16d_3fe3136f0da344eb9024f6c93c0578dc.pdf?index=true
    • 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_off00006506.bin
4da7c068fb4f17cd8b81aca8eb8d9c7594adb20d54d994606c5cfd38e8e5e760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5364 bytes
font_01_sfnt_off00007772.bin
7e0c55cc73189ee88e5eeff2793a7bd66ca0b2269d45e3e972a5b8fed1a8e660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 10100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.