Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45fc02c1927be4b…

MALICIOUS

PDF

52.5 KB Created: 2020-08-14 16:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20d40cfb26075bdef6ba4deafe6d69c SHA-1: be1ecfde9b31bd85ccc817e95d994bc4fa883e2c SHA-256: c45fc02c1927be4b4d6bb916f5c5b00af92656e7d2970dbb8f144874f551a8f6
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same topic as the malicious URL, suggesting a lure to attract users to click on the embedded links. The primary malicious URL is https://ttraff.ru/wb?keyword=application%20of%20rdna%20technology%20in%20medicine%20pdf.

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/wb?keyword=application%20of%20rdna%20technology%20in%20medicine%20pdf
    • http://files.theoliveandvine.com/uploads/1/3/2/6/132695749/jivudasunemiwe_buserazebomapu_kizuxi_zesizejopobu.pdf
    • http://files.bellahilllifestyle.com/uploads/1/3/1/4/131452997/puzubatajemofu_fobupireb_kipaxamu_vibototiguxutig.pdf
    • http://files.elaineraydesigns.com/uploads/1/3/0/7/130776218/12e0d673671.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/b._p._ed_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/tudufolokotizewupuzusikup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/kinewupolupusotadixujobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/93626681745.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/82881426210.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/58526170469.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/fikogowafuzulikeperuwosud.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/fugimapanunexam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3751/files/chinese_language_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/rapifavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/57344676004.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_off00008de5.bin
b0ebd087dbc03d0a23e9d9d28e51406ad0a958e05fe9cda633d7c4c064096433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE5 5480 bytes
font_01_sfnt_off0000a05c.bin
437fd62ea34e9fc11aa96f0a67294d8f0620ceb94bca8d7fd7c5defd31a147b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA05C 10772 bytes

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