Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed97a361132511d3…

MALICIOUS

PDF

48.8 KB Created: 2020-08-21 12:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb021293375dc6c92087bbe1a8dbbb7 SHA-1: fd479f920fc7e0a57eb8b9955e4862c4781f300e SHA-256: ed97a361132511d374c1569c4f231bc0d0d55a8e6f01d9372ac30f4e761f8cf7
150 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the target URL, suggesting a lure to a malicious site. The presence of numerous external PDF links further indicates a link farm strategy, likely to obscure the ultimate destination or to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=excel+vba+vlookup+table+in+another+sheet
    • http://files.blogoftheo.com/uploads/1/3/0/8/130874516/8104fe8fbd126.pdf
    • http://lavadukul.tidytimeservices.com/uploads/1/3/2/6/132680981/5344373.pdf
    • http://dewuvilu.epls1.com/uploads/1/3/1/8/131856331/ligorokasiviwarev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/laxerodumusotub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/volume_rectangular_prism_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/xitujabigoneso.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8385/files/zuruvarozezesuvavizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3382/0322/files/52393356626.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/75761828711.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/articles_of_confederation_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/94685020037.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/difizesigomudorisuzonigeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/luzobuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e9.bin
7bd824914faf45d6d89dd5318474b925b4e95435e790fda040141caa76599bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E9 5192 bytes
font_01_sfnt_off00008381.bin
2e3c8570e010df0f692f0b9c024b2796fd6cba1ecd1b3ad168ed84ea5c39949e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 10640 bytes
font_02_sfnt_off0000a798.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA798 4324 bytes

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