Malicious PDF — malware analysis report

Static analysis result for SHA-256 2819153bfe447856…

MALICIOUS

PDF

51.0 KB Created: 2020-09-28 18:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026adf59f130384bcad015545bfb9e96 SHA-1: a2362810ccd203d2a8d47a565b28ba9869a6fd55 SHA-256: 2819153bfe44785614fac67ba0b9fe24d8755eef5e6a11a47aa7f3bd797726e8
150 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains multiple heuristic firings indicating malicious redirector links and a link farm. The embedded URLs, such as https://cctraff.ru/mozel?keyword=personal+bio+data+format+pdf, are likely used to redirect users to malicious content. The document body contains garbled text and embedded URLs, further supporting the malicious nature of the file.

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://cctraff.ru/mozel?keyword=personal+bio+data+format+pdf
    • http://lared.maplegroveunitedchurch.com/uploads/1/3/2/3/132302780/xalupamediviwok.pdf
    • http://wovatozob.shiftingloyalties.org/uploads/1/3/1/3/131383982/dubafutegapeje.pdf
    • http://tulitufi.bamahorns.com/uploads/1/3/1/6/131637352/bezugum_kuxilen.pdf
    • http://rekufafa.pinkflamingogas.com/uploads/1/3/0/9/130968911/5899851.pdf
    • http://files.pimgro.com/uploads/1/3/0/7/130775867/8934533.pdf
    • https://site-1036728.mozfiles.com/files/1036728/fizojiselas.pdf
    • https://site-1036621.mozfiles.com/files/1036621/6116835788.pdf
    • https://site-1037101.mozfiles.com/files/1037101/podeg.pdf
    • https://site-1037114.mozfiles.com/files/1037114/bimalaxifewowitetut.pdf
    • https://site-1037202.mozfiles.com/files/1037202/xedinifumifasozoliwakufus.pdf
    • https://site-1036681.mozfiles.com/files/1036681/fipaxafom.pdf
    • https://site-1036939.mozfiles.com/files/1036939/nowupejero.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/87205047385.pdf
    • https://cdn.shopify.com/s/files/1/0467/7586/1401/files/35825997763.pdf
    • https://cdn.shopify.com/s/files/1/0439/3297/5272/files/metformin_tablet_side_effects_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/telugu_tamil_dubbed_movies_in_tamilrockers.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_off0000885e.bin
59e5047f364bd06d5966d57a5646ffcf93b03397adf63986a875981b907346ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 5328 bytes
font_01_sfnt_off00009a5d.bin
baf71ea4d8d830c9b7da1b9fa7112804b427d17437e40febab0c992be9120bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5D 10864 bytes

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