Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ded57c07f812e8d…

MALICIOUS

PDF

58.8 KB Created: 2020-08-22 16:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0a55007d25fe33065fb1bf4814c2fac SHA-1: 7c0d511d6586d76978640d85aa6c0e852f763ff1 SHA-256: 4ded57c07f812e8d19a6f308ba7ed532025e96683fda71d8395a21b722bf3d36
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=basar+game++video', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to direct users to potentially harmful external sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=basar+game++video
    • http://gikax.trinityfarmnwf.com/uploads/1/3/1/3/131380429/nepewipodawa.pdf
    • http://fexurob.shelbyveterinaryservice.com/uploads/1/3/0/7/130776783/ca35eeb19b.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/bloodstained_ritual_of_the_night_boss_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8757/files/all_song_2019_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0463/4660/0605/files/dengue_guideline_thai_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/multivariate_analysis_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/78466530621.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/ninifimudifivinimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/trove_server_status.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/91574843005.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/vomegirarurezaxosipal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7170/0120/files/pibenenavoviwufari.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_off00008d08.bin
cd2606caff711a82ada43f2ddcdd8d2af51796b3460595a5ea9e53534b6c3856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D08 8180 bytes
font_01_sfnt_off0000a858.bin
b2a8418e36ec8e4684ee93c9bc028ea3facd7d28e5de1158187aaf6cc494f022		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA858 5220 bytes
font_02_sfnt_off0000ba06.bin
88b97f97ee4cdcd7b8edb645e0fd0533200b0435bc61667cc84c775affe06c38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 10592 bytes

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